CN115028663A - Metal complex of norbornenyl methylene phosphine and derivative thereof - Google Patents

Metal complex of norbornenyl methylene phosphine and derivative thereof Download PDF

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CN115028663A
CN115028663A CN202210515189.2A CN202210515189A CN115028663A CN 115028663 A CN115028663 A CN 115028663A CN 202210515189 A CN202210515189 A CN 202210515189A CN 115028663 A CN115028663 A CN 115028663A
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norbornenylmethylene
phosphine
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metal complex
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张玉清
余志强
余东升
张履军
张航
陈虎斌
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Changzhou Deneng New Materials Co ltd
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Abstract

The invention belongs to the technical field of metal complexes, and particularly relates to a norbornene methylene phosphine and a metal complex of a derivative thereof. The structural general formula of the metal complex of the norbornenylmethylene phosphine and the derivative thereof is [ O ] y Cl z P(NB‑CH 2 ) n ] m MCl x Of the type of metalThe compound has higher activity for catalyzing the polymerization of dicyclopentadiene, has good solubility in dicyclopentadiene, and double bonds in the structure of the compound can participate in the polymerization reaction of the dicyclopentadiene, so that the crosslinking degree of the polydicyclopentadiene is increased, and the mechanical property of the polydicyclopentadiene is improved.

Description

Metal complex of norbornenyl methylene phosphine and derivative thereof
Technical Field
The invention belongs to the technical field of metal complexes, and particularly relates to a norbornene methylene phosphine and a metal complex of a derivative thereof.
Background
The hydrocarbyl phosphine metal complex has certain catalysis effect on certain organic reactions. The complexes, such as tungsten hexachloride, molybdenum pentachloride, titanium tetrachloride and the like and the complexes generated by alkyl (oxy) phosphine can catalyze cycloolefins to carry out ring-opening metathesis polymerization. In the prior art, the ring-opening polymerization of dicyclopentadiene is carried out by using a complex (ring-opening metathesis catalyst) generated by the reaction of triphenylphosphine, tungsten hexachloride and molybdenum pentachloride to generate polydicyclopentadiene.
The ring-opening metathesis catalyst is relatively stable to the environment and relatively high in activity, but the solubility in dicyclopentadiene is poor, the concentration of completely initiating polymerization can be obtained by using a cosolvent during compounding, and the mechanical properties and other properties of the conventional polydicyclopentadiene are required to be further improved.
Disclosure of Invention
The invention aims to provide a metal complex of norbornenyl methylene phosphine and a derivative thereof, which can catalyze ring opening polymerization of dicyclopentadiene to further improve the performances of polydicyclopentadiene such as tensile strength, impact strength and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a metal complex of norbornenyl methylene phosphine and derivatives thereof, the structural general formula of which is [ O ] y Cl z P(NB-CH 2 ) n ] m MCl x ，O y Cl z P(NB-CH 2 ) n Is norbornenylmethylenephosphine or a derivative thereof, MCl x Is a transition metal chloride; x is the valence state of the transition metal M; the norbornenyl methylene phosphine and the derivative thereof are ligands of transition metal chlorides, m is a coordination number, and molecules of the norbornenyl methylene phosphine and the derivative thereofThe structure is shown as formula (a):
Figure BDA0003639226640000011
in the formula (a), n is 1, 2 or 3, y is 0 or 1, and z is 0, 1 or 2.
The metal complex of the norbornenyl methylene phosphine and the derivative thereof has higher activity of catalyzing polymerization of dicyclopentadiene, has good solubility in dicyclopentadiene, and double bonds in the structure can participate in polymerization reaction of dicyclopentadiene, so that the crosslinking degree of polydicyclopentadiene is increased, and the mechanical property of polydicyclopentadiene is improved.
Further, the molecular structure of the norbornenylmethylene phosphine and the derivative thereof is as follows:
Figure BDA0003639226640000021
furthermore, x is any natural number from 1 to 6. And m is 1, 2 or 3.
Further, M is rhodium, platinum, ruthenium, tungsten, molybdenum, titanium, or vanadium. Further, M is ruthenium, tungsten, molybdenum or titanium.
Further, the MCl x Is rhodium trichloride, platinum tetrachloride, ruthenium trichloride, tungsten hexachloride, molybdenum pentachloride, titanium tetrachloride or vanadium pentachloride. Further, the MCl x Is tungsten hexachloride, molybdenum pentachloride, titanium tetrachloride or ruthenium trichloride.
Further, the metal complex of norbornenylmethylenephosphine and a derivative thereof is tris [ (norbornenylmethylene) dichlorophosphine ] tungsten hexachloride, tris [ tris (norbornenylmethylene) phosphine ] tungsten hexachloride, bis [ tris (norbornenylmethylene) phosphine ] molybdenum pentachloride, bis [ bis (norbornenylmethylene) chlorophosphine ] titanium tetrachloride, bis [ tris (norbornenylmethylene) phosphine ] ruthenium trichloride, bis [ bis (norbornenylmethylene) chlorophosphine ] tungsten hexachloride, bis [ bis (norbornenylmethylene) phosphinic chloride ] molybdenum pentachloride, or tris [ tris (norbornenylmethylene) oxyphosphine ] tungsten hexachloride.
Further, the metal complex of norbornenylmethylene phosphine and derivatives thereof is prepared by a method comprising the steps of: 1) reacting 5-halomethyl-2-norbornene with magnesium to produce a 5-methyl-2-norbornene grignard reagent; 2) carrying out a Grignard reaction on a 5-methyl-2-norbornene Grignard reagent and a phosphonating agent to generate a compound shown as a formula (a); the phosphating agent is phosphorus trichloride or phosphorus oxychloride; 3) reacting a compound represented by the formula (a) with a chloride of a transition metal in a solvent.
Further, in the step 1), the molar ratio of the 5-halomethyl-2-norbornene to the magnesium is 1 (1-1.5).
Further, in the step 1), the reaction of 5-halomethyl-2-norbornene and magnesium is: 5-halomethyl-2-norbornene is added to a solvent containing magnesium, followed by heating and refluxing. Further, the temperature of the heating reflux is 66 ℃ and the time is 1 h. The time for adding 5-methyl-2-norbornene was 2 h. The solvent is tetrahydrofuran.
Further, the 5-halomethyl-2-norbornene is prepared by a method comprising the steps of: cyclopentadiene is added to a solvent containing allyl bromide or allyl chloride to carry out a reaction, and then the reaction is continued by heating.
Further, the 5-halomethyl-2-norbornene is 5-bromomethyl-2-norbornene or 5-chloromethyl-2-norbornene.
Further, in the step 2), the molar ratio of the 5-methyl-2-norbornene Grignard reagent to the phosphonating agent is (1-3): 1.
Further, in order to achieve both reaction efficiency and yield, in the step 2), the grignard reaction comprises the following steps: mixing a 5-methyl-2-norbornene Grignard reagent and a phosphonating agent in a solvent at the temperature of 0-3 ℃, heating to 66 ℃, refluxing for 1-2 hours, cooling to below 0 ℃, and preserving heat for 0.5-1 hour.
Further, the molar ratio of the compound represented by the formula (a) to the chloride of the transition metal is (1-3): 1. In the step 3), the reaction temperature is 60 ℃ and the reaction time is 1 h. Further, the solvent in step 3) is toluene or acetate. Further, the number of carbon atoms in the ester group of the acetate is 4 to 8.
Further, the compound represented by the formula (a) and a chloride of a transition metal are reacted in a solvent: a transition metal chloride is dissolved in a solvent, and then a solution of a compound represented by the formula (a) is added and heated to 60 ℃ to carry out a reaction. Further, the time for adding the solution of the compound represented by formula (a) is 2 hours. The temperature of the solvent was 50 ℃.
Detailed Description
The present invention will be further described with reference to the following examples.
Examples of Metal complexes of Mono, norbornenylmethylenephosphines and derivatives thereof
Example 1
The norbornenylmethylenephosphine derivative metal complex of this example was tris [ (norbornenylmethylene) dichlorophosphine hexachloride]Tungsten alloy with the structure of [ Cl 2 P(NB-CH 2 )] 3 WCl 6 Wherein, the structure of the norbornenyl methylene dichloride phosphine is shown as the following figure:
Figure BDA0003639226640000041
tungsten hexachloride tris [ (norbornenylmethylene) dichlorophosphine ] of this example was prepared by the following procedure:
1) adding allyl bromide into a reaction bottle placed in a 30 ℃ water bath, dropwise adding freshly distilled cyclopentadiene with the amount of 1.2 times of the allyl bromide substance into a reaction system in a stirring reaction bottle, controlling the reaction temperature to be not more than 30 ℃, keeping the temperature at 30 ℃, continuing stirring for 2 hours, and distilling at 50 ℃ under reduced pressure to obtain a compound 5-bromomethyl-2-norbornene, wherein the yield is 98.5%, and the reaction formula is shown as follows:
Figure BDA0003639226640000042
2) 200mL of tetrahydrofuran was charged in a four-necked flask, and 6.8g (0.28mol) of fresh magnesium chips was added with stirring the tetrahydrofuran, and the gas in the four-necked flask was replaced with nitrogen, and 40.4g (0.23mol) of 5-bromomethyl-2-norbornene (5-bromomethylbicyclo [2.2.1] hept-2-ene 170CAS 16-12-5) prepared in step 1) was added dropwise at room temperature, and after dropping over 2 hours, the mixture was heated to 66 ℃ and refluxed for 1 hour to obtain a tetrahydrofuran solution containing 5-methyl-2-norbornene Grignard reagent, the reaction formula is as follows:
Figure BDA0003639226640000043
3) cooling the 5-methyl-2-norbornene Grignard reagent tetrahydrofuran solution prepared in the step 2) to below 0 ℃, filtering to remove residues, dropwise adding a tetrahydrofuran mixed solution containing 31.6g of phosphorus trichloride (0.23mol) while stirring, controlling the dropwise adding speed to maintain the reaction temperature between 0 and 3 ℃, heating the mixture to 66 ℃ after the dropwise adding is finished, refluxing for 1h, then cooling to below 0 ℃, and preserving heat for 0.5h, wherein the reaction formula is shown as follows:
Figure BDA0003639226640000044
4) adding 50mL of ice water solution containing ammonium chloride and a few drops of concentrated hydrochloric acid into the solution obtained in the step 3) and cooled to below 0 ℃ while stirring, accelerating the hydrolysis of phosphorus trichloride, discharging the water layer at the lower part of the solution within 1h by using a separating funnel, drying the tetrahydrofuran layer by using anhydrous sodium sulfate, and evaporating tetrahydrofuran to obtain tris (norbornenylmethylene) phosphine with the yield of 78%;
5) toluene is added into a reaction bottle which is placed in a water bath with the temperature of 50 ℃, and tungsten hexachloride is added under the condition of stirring the toluene to be completely dissolved;
6) dripping a toluene solution of the tris (norbornenylmethylene) dichlorophosphine prepared in the step 4) (the concentration of the tris (norbornenylmethylene) dichlorophosphine is 30%, controlling the amount of the tris (norbornenylmethylene) dichlorophosphine to be three times of that of tungsten hexachloride) into the reaction bottle in the step 5) by using a constant-pressure funnel, raising the temperature to 60 ℃ after 2h addition, continuing to react for 1h to obtain a tris [ tris (norbornenylmethylene) dichlorophosphine ] tungsten hexachloride solution, and directly serving as a catalyst for ring-opening metathesis polymerization, wherein the reaction formula is shown as follows:
Figure BDA0003639226640000051
in the formula, MCl x Is WCl 6 ，[P(NB-CH 2 ) 3 ] n MCl x Is [ Cl ] 2 P(NB-CH 2 )] 3 WCl 6 。
Example 2
The norbornenylmethylenephosphine derivative metal complex of this example was tris [ tris (norbornenylmethylene) phosphine hexachloride]Tungsten alloy with the structure of [ P (NB-CH) 2 ) 3 ] 3 WCl 6 Wherein the structure of the tri (norbornenylmethylene) phosphine is shown as the following figure:
Figure BDA0003639226640000052
the tungsten trichloride [ tris (norbornenylmethylene) phosphine ] of this example was prepared using the following procedure:
1) adding allyl bromide into a reaction bottle placed in a 30 ℃ water bath, dropwise adding freshly distilled cyclopentadiene with the amount of 1.2 times of the allyl bromide substance into a reaction system in a stirring reaction bottle, controlling the reaction temperature to be not more than 30 ℃, keeping the temperature at 30 ℃, continuing stirring for 2 hours, and distilling at 50 ℃ under reduced pressure to obtain a compound 5-bromomethyl-2-norbornene, wherein the yield is 98.5%, and the reaction formula is shown as follows:
Figure BDA0003639226640000053
2) 200mL of tetrahydrofuran was charged into a four-necked flask, and 6.8g (0.28mol) of fresh magnesium chips was added while stirring the tetrahydrofuran, and the gas in the four-necked flask was replaced with nitrogen, and 40.4g (0.23mol) of 5-bromomethyl-2-norbornene (5-bromomethylbicyclo [2.2.1] hept-2-ene CAS17016-12-5) prepared in step 1) was added dropwise at room temperature, and after dropping over 2 hours, the mixture was heated to 66 ℃ and refluxed for 1 hour to obtain a tetrahydrofuran solution containing a 5-methyl-2-norbornene Grignard reagent, the reaction formula is as follows:
Figure BDA0003639226640000061
3) cooling the 5-methyl-2-norbornene Grignard reagent tetrahydrofuran solution prepared in the step 2) to below 0 ℃, filtering to remove residues, dropwise adding a tetrahydrofuran mixed solution containing 10.57g of phosphorus trichloride (0.077mol) while stirring, controlling the dropwise adding speed to maintain the reaction temperature between 0 and 3 ℃, heating the mixture to 66 ℃ after the dropwise adding is finished, refluxing for 1h, then cooling to below 0 ℃, and preserving heat for 0.5h, wherein the reaction formula is shown as follows:
Figure BDA0003639226640000062
4) adding 50mL of ice water solution containing ammonium chloride and a few drops of concentrated hydrochloric acid into the solution obtained in the step 3) and cooled to below 0 ℃ while stirring, accelerating the hydrolysis of phosphorus trichloride, discharging the water layer at the lower part of the solution within 1h by using a separating funnel, drying the tetrahydrofuran layer by using anhydrous sodium sulfate, and evaporating tetrahydrofuran to obtain tris (norbornenylmethylene) phosphine with the yield of 73%;
5) toluene is added into a reaction bottle which is placed in a water bath with the temperature of 50 ℃, and tungsten hexachloride is added under the condition of stirring the toluene to be completely dissolved;
6) dripping a toluene solution of the tri (norbornenylmethylene) phosphine prepared in the step 4) (the concentration of the tri (norbornenylmethylene) phosphine is 30%, the amount of the tri (norbornenylmethylene) phosphine substance is controlled to be three times of that of tungsten hexachloride) into the reaction bottle in the step 5) by using a constant-pressure funnel, heating to 60 ℃ after 2h addition, and continuing to react for 1h to obtain a solution of tris [ tri (norbornenylmethylene) phosphine ] tungsten hexachloride, wherein the solution can be directly used as a catalyst for ring-opening metathesis polymerization and has the following reaction formula:
Figure BDA0003639226640000071
in the formula, MCl x Is WCl 6 ，[P(NB-CH 2 ) 3 ] n MCl x Is [ P (NB-CH) 2 ) 3 ] 3 WCl 6 。
Example 3
The norbornenylmethylenephosphine derivative metal complex of this example was bis [ tris (norbornenylmethylene) phosphine pentachloride]Molybdenum in the structure of [ P (NB-CH) 2 ) 3 ] 2 MoCl 5 ；
The bis [ tris (norbornenylmethylene) phosphine ] molybdenum pentachloride of this example was prepared by the following procedure:
steps 1) to 4) were carried out by referring to the procedure in example 2;
5) toluene is added into a reaction bottle which is placed in a water bath with the temperature of 50 ℃, and molybdenum pentachloride is added under the condition of stirring the toluene to be completely dissolved;
6) and (3) dripping a toluene solution of the tri (norbornenylmethylene) phosphine prepared in the step (4) (the concentration of the tri (norbornenylmethylene) phosphine is 30 percent, the amount of the tri (norbornenylmethylene) phosphine is controlled to be twice of that of molybdenum pentachloride) into the reaction bottle in the step (5) by using a constant-pressure funnel, heating to 60 ℃ after 2 hours of addition, and continuing to react for 1 hour to obtain a solution of bis [ tri (norbornenylmethylene) phosphine ] molybdenum pentachloride, which can be directly used as a catalyst for ring-opening metathesis polymerization.
Example 4
The norbornenylmethylenephosphine derivative metal complex of this example was bis [ di (norbornenylmethylene) chlorophosphine tetrachloride]Titanium alloy with the structure of [ ClP (NB-CH) 2 ) 2 ] 2 TiCl 4 Wherein the structure of the bis (norbornenylmethylene) chlorophosphine is shown as the following figure:
Figure BDA0003639226640000081
the titanium bis [ bis (norbornenylmethylene) chlorophosphine ] tetrachloride of this example was prepared by the following procedure:
steps 1) to 3) were conducted in accordance with the procedure in example 1, and in step 3), 5-bromomethyl-2-norbornene and phosphorus trichloride were reacted at a molar ratio of 2:1, under otherwise unchanged conditions, according to the following reaction scheme:
Figure BDA0003639226640000082
4) dropwise adding 50mL of ice water solution containing ammonium chloride and a few drops of concentrated hydrochloric acid into the solution obtained in the step 3) and cooled to below 0 ℃ while stirring, accelerating the hydrolysis of phosphorus trichloride, discharging the water layer at the lower part of the solution within 1h by using a separating funnel, drying the tetrahydrofuran layer by using anhydrous sodium sulfate, and distilling out tetrahydrofuran to obtain bis (norbornenylmethylene) chlorophosphine, wherein the yield is 81%;
5) adding toluene into a reaction bottle placed in a water bath at 50 ℃, and adding titanium tetrachloride to completely dissolve the toluene under the condition of stirring the toluene;
6) and (3) dripping a toluene solution of the bis (norbornenylmethylene) chlorophosphine prepared in the step (4) (the concentration of the bis (norbornenylmethylene) chlorophosphine is 30 percent) into the reaction bottle in the step (5) by using a constant-pressure funnel, controlling the amount of the bis (norbornenylmethylene) chlorophosphine to be twice of that of titanium tetrachloride), heating to 60 ℃ after 2 hours of addition, and continuing to react for 1 hour to obtain a bis [ bis (norbornenylmethylene) chlorophosphine ] titanium tetrachloride solution which can be directly used as a catalyst for ring-opening metathesis polymerization.
Example 5
The norbornenylmethylenephosphine derivative metal complex of this example was bis [ tris (norbornenylmethylene) phosphine trichloride]Ruthenium complex with the structure of [ P (NB-CH) 2 ) 3 ] 2 RuCl 3 。
Bis [ tris (norbornenylmethylene) phosphine ] ruthenium trichloride according to this example was prepared by the following procedure:
steps 1) to 4) were carried out by referring to the procedure in example 2;
5) toluene is added into a reaction bottle which is placed in a water bath with the temperature of 50 ℃, and ruthenium trichloride is added under the condition of stirring the toluene to be completely dissolved;
6) and (3) dripping a toluene solution of the tri (norbornenylmethylene) phosphine prepared in the step (4) (the concentration of the tri (norbornenylmethylene) phosphine is 30 percent, the amount of the tri (norbornenylmethylene) phosphine is controlled to be twice of that of ruthenium trichloride) into the reaction bottle in the step (5) by using a constant-pressure funnel, heating to 60 ℃ after 2 hours of addition, and continuing to react for 1 hour to obtain a solution of bis [ tri (norbornenylmethylene) phosphine ] ruthenium trichloride, wherein the solution can be directly used as a catalyst for ring-opening metathesis polymerization.
Example 6
The norbornenylmethylenephosphine derivative metal complex of this example was bis [ bis (norbornenylmethylene) chlorophosphine hexachloride]Tungsten alloy with the structure of [ ClP (NB-CH) 2 ) 2 ] 2 WCl 6 。
The tungsten hexachloride bis [ bis (norbornenylmethylene) chlorophosphine ] of this example was prepared using the following procedure:
steps 1) to 4) were carried out by referring to the procedure in example 4;
5) toluene is added into a reaction bottle which is placed in a water bath with the temperature of 50 ℃, and tungsten hexachloride is added under the condition of stirring the toluene to be completely dissolved;
6) and (3) dripping a toluene solution of the bis (norbornenylmethylene) chlorophosphine prepared in the step (4) (the concentration of the bis (norbornenylmethylene) chlorophosphine is 30 percent) into the reaction bottle in the step (5) by using a constant-pressure funnel, controlling the amount of the bis (norbornenylmethylene) chlorophosphine substance to be twice of that of tungsten hexachloride), heating to 60 ℃ after 2 hours of addition, and continuing to react for 1 hour to obtain a bis [ bis (norbornenylmethylene) chlorophosphine ] tungsten hexachloride solution which can be directly used as a catalyst for ring-opening metathesis polymerization.
Example 7
The norbornenylmethylenephosphine derivative metal complex of this example was bis [ di (norbornenylmethylene) phosphinic acid chloride pentachloride]Molybdenum in the structure of [ ClOP (NB-CH) 2 ) 2 ] 2 MoCl 5 Wherein, the structure of the bis (norbornenylmethylene) phosphinic chloride is shown as the following figure:
Figure BDA0003639226640000091
the bis [ bis (norbornenylmethylene) phosphinic chloride ] molybdenum pentachloride of this example was prepared by the following procedure:
steps 1) to 3) were carried out by referring to the procedure in example 1, and in step 3), 5-bromomethyl-2-norbornene and phosphorus oxychloride were reacted at a molar ratio of 2:1, without changing other conditions, according to the following reaction formula:
Figure BDA0003639226640000101
4) dropwise adding 50mL of ice water solution containing ammonium chloride and a few drops of concentrated hydrochloric acid into the solution obtained in the step 3) and cooled to below 0 ℃ while stirring, accelerating the hydrolysis of phosphorus oxychloride, discharging the water layer at the lower part of the solution within 1h by using a separating funnel, drying the tetrahydrofuran layer by using anhydrous sodium sulfate, and distilling out tetrahydrofuran to obtain bis (norbornenylmethylene) phosphinic acid chloride with the yield of 71%;
5) toluene is added into a reaction bottle which is placed in a water bath with the temperature of 50 ℃, and molybdenum pentachloride is added under the condition of stirring the toluene to be completely dissolved;
6) and (3) dripping a toluene solution of the bis (norbornenylmethylene) phosphinic chloride prepared in the step (4) (the concentration of the bis (norbornenylmethylene) phosphinic chloride is 30 percent) into the reaction bottle in the step (5) by using a constant-pressure funnel, controlling the amount of the bis (norbornenylmethylene) phosphinic chloride substance to be twice of that of molybdenum pentachloride), heating to 60 ℃ after 2 hours of addition, and continuing to react for 1 hour to obtain a solution of bis [ bis (norbornenylmethylene) phosphinic chloride ] molybdenum pentachloride, wherein the solution can be directly used as a catalyst for ring-opening metathesis polymerization.
Example 8
The norbornenylmethylenephosphine derivative metal complex of this example was tris [ tris (norbornenylmethylene) oxyphosphine hexachloride]Tungsten alloy with the structure [ OP (NB-CH) 2 ) 3 ] 3 WCl 6 Wherein, tris (norbornenylmethylene)) The structure of phosphine oxide is shown in the following figure:
Figure BDA0003639226640000102
the tungsten trichloride tris [ tris (norbornenylmethylene) phosphine oxide ] of this example was prepared by the following procedure:
steps 1) to 3) were conducted by referring to the procedure of example 1, and step 3) was conducted by reacting 5-bromomethyl-2-norbornene with phosphorus oxychloride at a molar ratio of 3:1, while keeping the reaction conditions unchanged, and the reaction formula is as follows:
Figure BDA0003639226640000111
4) dropwise adding 50mL of ice water solution containing ammonium chloride and a few drops of concentrated hydrochloric acid into the solution obtained in the step 3) and cooled to below 0 ℃ while stirring, accelerating the hydrolysis of phosphorus oxychloride, discharging the water layer at the lower part of the solution within 1h by using a separating funnel, drying the tetrahydrofuran layer by using anhydrous sodium sulfate, and distilling out tetrahydrofuran to obtain tris (norbornenylmethylene) phosphine oxide with the yield of 75%;
5) adding toluene into a reaction bottle placed in a water bath at 50 ℃, and adding tungsten hexachloride under the condition of stirring the toluene to completely dissolve the tungsten hexachloride;
6) and (3) dripping a toluene solution of the tri (norbornenylmethylene) phosphine oxide prepared in the step (4) (the concentration of the tri (norbornenylmethylene) phosphine oxide is 30 percent) into the reaction bottle in the step (5) by using a constant-pressure funnel, controlling the amount of the tri (norbornenylmethylene) phosphine oxide substance to be three times of that of tungsten hexachloride), heating to 60 ℃ after 2 hours of addition, and continuing to react for 1 hour to obtain a solution of tris [ tri (norbornenylmethylene) phosphine oxide ] tungsten hexachloride, wherein the solution can be directly used as a catalyst for ring-opening metathesis polymerization.
Second, Experimental example
Experimental example 1 preparation of Dicyclopentadiene
In this example, dicyclopentadiene is prepared using tris [ tris (norbornenylmethylene) phosphine ] tungsten hexachloride from example 2 as a procatalyst by the specific steps of:
1) according to the formula of dicyclopentadiene: ethylidene norbornene: the SBS elastomer ratio was 82: 10: 8 preparing a polymerization base material, and respectively and equivalently filling the polymerization base material into A, B raw material tanks of a reaction injection molding machine;
2) adding tungsten hexachloride tri [ tri (norbornenylmethylene) phosphine ] as a main catalyst into a raw material tank A of a reaction injection molding machine filled with dicyclopentadiene to form a mixture A, wherein the molar ratio of the main catalyst to the total dicyclopentadiene is 1: 2000; under the protection of nitrogen, adding diethyl aluminum monochloride into a raw material tank B of a reaction injection molding machine filled with dicyclopentadiene to form a mixture B; the molar ratio of tris [ tris (norbornenylmethylene) phosphine ] tungsten hexachloride to diethylaluminum monochloride is 1: 15;
3) and (3) under the condition of 60 ℃, mixing the mixture in the A, B raw material tank at a high speed by a reaction injection molding machine, injecting the mixture into a preheated mold at 60 ℃, preserving heat for 5min, and opening the mold to obtain the polydicyclopentadiene product.
Experimental example 2 preparation of Dicyclopentadiene
In this experimental example, dicyclopentadiene is prepared using bis [ tris (norbornenylmethylene) phosphine ] molybdenum pentachloride from example 3 as a procatalyst by the specific steps of:
1) according to the weight ratio of dicyclopentadiene: ethylidene norbornene: the SBS elastomer ratio was 82: 10: 8 preparing a polymerization base material, and respectively and equivalently filling the polymerization base material into A, B raw material tanks of a reaction injection molding machine;
2) adding bis [ tri (norbornenylmethylene) phosphine ] molybdenum pentachloride serving as a main catalyst into a raw material tank A of a reaction injection molding machine filled with dicyclopentadiene to form a mixture A, wherein the molar ratio of the main catalyst to the total dicyclopentadiene is 1: 3000; under the protection of nitrogen, adding diethyl aluminum monochloride into a raw material tank B of a reaction injection molding machine filled with dicyclopentadiene to form a mixture B; the molar ratio of bis [ tris (norbornenylmethylene) phosphine ] molybdenum pentachloride to diethylaluminum monochloride is 1: 20;
3) and (3) under the condition of 60 ℃, mixing the mixture in the A, B raw material tank at a high speed by a reaction injection molding machine, injecting the mixture into a preheated mold at 60 ℃, preserving heat for 5min, and opening the mold to obtain the polydicyclopentadiene product.
Experimental example 3 preparation of Dicyclopentadiene
In this experimental example, bis [ tris (norbornenylmethylene) phosphine ] ruthenium trichloride in example 5 was used as a procatalyst to prepare dicyclopentadiene, which comprises the following steps:
1) according to the formula of dicyclopentadiene: ethylidene norbornene: the SBS elastomer ratio was 82: 10: 8 preparing a polymerization base material, and respectively and equivalently filling the polymerization base material into A, B raw material tanks of a reaction injection molding machine;
2) adding bis [ tri (norbornenylmethylene) phosphine ] ruthenium trichloride serving as a main catalyst into a raw material tank A of a reaction injection molding machine filled with dicyclopentadiene to form a mixture A, wherein the molar ratio of the main catalyst to the total dicyclopentadiene is 1: 3500; under the protection of nitrogen, adding diethyl aluminum monochloride into a raw material tank B of a reaction injection molding machine filled with dicyclopentadiene to form a mixture B; the molar ratio of bis [ tris (norbornenylmethylene) phosphine ] ruthenium trichloride to diethylaluminum monochloride is 1: 20;
3) and (3) under the condition of 60 ℃, mixing the mixture in the A, B raw material tank at a high speed by a reaction injection molding machine, injecting the mixture into a preheated mold at 60 ℃, preserving heat for 5min, and opening the mold to obtain the polydicyclopentadiene product.
Experimental example 4 preparation of Dicyclopentadiene
The preparation method of dicyclopentadiene in this experimental example is different from the preparation method of dicyclopentadiene in experimental example 1 only in that the comparative example employs reactants (molar ratio 3:1) of 2, 6-di-tert-butyl-p-cresol and tungsten pentachloride as a main catalyst, and the molar ratio of the main catalyst to dicyclopentadiene is 1: 2500; the molar ratio of the main catalyst to the diethyl aluminum monochloride is 1: 30. No description is given with reference to Experimental example 1.
Experimental example 5 mechanical Property test
The polydicyclopentadiene products of experimental examples 1-4 were tested for their performance, and the test results are shown in table 1. The test method comprises the following steps: the tensile strength test is carried out according to GB/T1040.2-2006, and the impact strength test is carried out according to GB/T1843-2008.
TABLE 1 Performance test results for polydicyclopentadiene articles of Experimental examples 1-4
Tensile Strength (MPa) Impact Strength (J/m)
Experimental example 1 50.2 370
Experimental example 2 52.4 383
Experimental example 3 58.5 415
Experimental example 4 46.4 320
As can be seen from Table 1, compared with the experimental example 4, the polydicyclopentadiene product prepared by the experimental examples 1-3 of the invention has greatly improved tensile strength and impact strength and wider application range.

Claims (10)

1. The metal complex of norbornenyl methylene phosphine and its derivative features its general structural formula of [ O y Cl z P(NB-CH 2 ) n ] m MCl x ，O y Cl z P(NB-CH 2 ) n Is norbornenylmethylenephosphine or a derivative thereof, MCl x Is a transition metal chloride; x is the valence state of the transition metal M; the norbornenyl methylene phosphine and the derivative thereof are ligands of transition metal chlorides, m is a coordination number, and the molecular structure of the norbornenyl methylene phosphine and the derivative thereof is shown as a formula (a):
Figure FDA0003639226630000011
in the formula (a), n is 1, 2 or 3, y is 0 or 1, and z is 0, 1 or 2.
2. The metal complex of norbornenylmethylene phosphine and its derivatives according to claim 1, characterized in that the molecular structure of said norbornenylmethylene phosphine and its derivatives is:
Figure FDA0003639226630000012
3. the metal complex of norbornenylmethylenephosphine and derivatives thereof according to claim 1, wherein M is rhodium, platinum, ruthenium, tungsten, molybdenum, titanium, or vanadium; the MCl x Is rhodium trichloride, platinum tetrachloride, ruthenium trichloride, tungsten hexachloride, molybdenum pentachloride, titanium tetrachloride or vanadium pentachloride.
4. The metal complex of norbornenylmethylenephosphine and its derivative according to claim 1, wherein the metal complex of norbornenylmethylenephosphine and its derivative is tris [ (norbornenylmethylene) dichlorophosphine ] tungsten hexachloride, tris [ tris (norbornenylmethylene) phosphine ] tungsten hexachloride, bis [ tris (norbornenylmethylene) phosphine ] molybdenum pentachloride, bis [ bis (norbornenylmethylene) chlorophosphine ] titanium tetrachlorochloride, bis [ tris (norbornenylmethylene) phosphine ] ruthenium trichloride, bis [ bis (norbornenylmethylene) chlorophosphine ] tungsten hexachloride, bis [ bis (norbornenylmethylene) phosphinic chloride ] molybdenum pentachloride or tris [ tris (norbornenylmethylene) oxyphosphine ] tungsten hexachloride.
5. The metal complex of norbornenylmethylene phosphine and its derivatives according to any one of claims 1 to 4, characterized in that it is obtained by a process comprising the steps of: 1) reacting 5-halomethyl-2-norbornene with magnesium to produce a 5-methyl-2-norbornene Grignard reagent; 2) performing a Grignard reaction on a 5-methyl-2-norbornene Grignard reagent and a phosphonating agent to generate a compound shown in a formula (a); the phosphating agent is phosphorus trichloride or phosphorus oxychloride; 3) a compound represented by the formula (a) is reacted with a chloride of a transition metal in a solvent.
6. The metal complex of norbornenylmethylenephosphine and its derivative according to claim 5, wherein the molar ratio of 5-halomethyl-2-norbornene and magnesium in the step 1) is 1 (1 to 1.5).
7. The metal complex of norbornenylmethylenephosphine and its derivative according to claim 5, wherein in the step 2), the molar ratio of the 5-methyl-2-norbornene Grignard reagent to the phosphonating agent is (1 to 3): 1.
8. The metal complex of norbornenylmethylenephosphine and derivatives thereof according to claim 7, characterized in that the Grignard reaction comprises the following steps: mixing a 5-methyl-2-norbornene Grignard reagent and a phosphonating agent in a solvent at the temperature of 0-3 ℃, heating to 66 ℃, refluxing for 1-2 hours, cooling to below 0 ℃, and preserving heat for 0.5-1 hour.
9. The metal complex of norbornenylmethylenephosphine and its derivative according to claim 5, wherein in the step 3), the molar ratio of the compound represented by the formula (a) to the chloride of the transition metal is (1-3): 1.
10. The metal complex of norbornenylmethylenephosphine and derivatives thereof according to claim 5, wherein the reaction in step 3) is carried out at 60 ℃ for 1 hour.
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