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A new type of selenious polymer, silica-bound polybispropoxyethyl-selenidesilsesquioxane,and its platinum complex were synthesized from bis-allyloxyethyl selenide via hydrosily-lation with triethoxysilane, followed by immobilized on fumed silica, and then reactingwith potassium chloroplatinite under nitrogen atmosphere in acetone. It was found thatthe platinum complex can catalyze the hydrosilylation of olefins with triethoxysilane effec-tively The effects of the nature of the substrate, the amount of complex used, and thereaction temperature on the catalytic activity were investigated. 相似文献
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Two polysiloxanes with pendant fullerene moieties and their platinum or rhodium complexes havebeen prepared from C_(60) via amination with ω-decenylamine, followed by hydrosilylation with triethoxysilaneand immobilization on fumed silica or by hydrosilylation with methyldichlorosilane and polycondensationwith polydimethylsiloxanol, and then by reacting them with potassium chloroplatinite or rhodium chloride inacetone respectively under argon atmosphere. It was found that the four noble metal complexes are effectivecatalysts for the hydrosilylation of olefins with triethoxysilane. The regioselcctivity of platinum complexesfor styrene increases remarkably by introducing C_(60) moiety. Factors influencing catalytic activity and themechanism have been investigated. 相似文献
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本文报道首例高分子负载碲铂配位硅氢化催化剂。氯甲基化交联聚苯乙烯在氢化钠存在下,在二氧六环中与民β,β'-二羟乙基碲醚缩合,再与氯亚铂酸钾或三氯化铑反应,得到相应的聚苯乙烯负载碲醚铂、铑配位硅氢化催化剂,二者对烯烃与三乙氧基硅烷的硅氢化反应具有良好的催化活性。 相似文献
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Silica-bound 15-Crown-5, 18-Crown-6 with a spacer of propyloxymethyl and their platinum complexes have been synthesized. It was found that they were efficient catalysts for the hydrosilylation of olefms with triethoxysilane in the temperature range of 60 to 130 ℃. 相似文献
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聚γ-(m-二苯膦苯基)丙基硅氧烷——铂络合物对烯烃硅氢化反应的催化特征 总被引:3,自引:0,他引:3
本文报道二氧化硅负载的三苯膦铂络合物——聚γ-(m-二苯膦苯基)丙基硅氧烷铂络合物对三甲氧基硅烷与不饱和化合物进行硅氢加成反应的催化特性.在底物用量的万分之一摩尔量的铂络合物存在下,1-己烯、1-癸烯、1-十二碳烯、苯基烯丙醚和ω-氯代十一碳烯在60或40℃平稳地与三甲氧基硅烷发生硅氢加成反应,唯一地得到末端加成产物,产率均在85%以上.其催化活性在反应初期低于四(三苯膦)合铂,但后期反应速度和硅氢化产率均较高.实验表明,聚γ-(m-二苯膦苯基)丙基硅氧烷与四(三苯膦)合铂反应制得的铂络合物(1)比与氯铂酸反应制得的铂络合物(Ⅱ)催化活性高.其次,反应气氛对硅氢加成反应具有决定性的影响.在空气气氛中,硅氢化反应平稳地进行;在氮气气氛中,不发生反应. 相似文献
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有机硅聚合物负载膦铂,膦铑络合物的合成及催化硅氢化性能 总被引:3,自引:1,他引:3
从p-氯烯丙苯出发,通过相继地与三甲氧基硅烷进行硅氢加成、二苯膦钾膦化、气相法二氧化硅固载化,再与氯亚铂酸钾或三氯化铑反应,合成了聚γ-(p-二苯膦苯基)丙基硅氧烷铂、铑络合物。两者对烯烃与三乙氧基硅烷的硅氢加成反应具有良好的催化活性。 相似文献
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1NTRODUCTIONTheacrylateterpolymer--supPOrtedsulfideplatinumcomplexanddisulfideplatinumcomplex['--2]werestudiedinthehydrosilylationofolefins.Itisfoundthattheyhavehighcatalyticactivityandreusedproperties.LiuXFetal.[3)synthesizedselena--crowneitherplatinumcomplexesandreportedtheircatalyticactivityofhydrosilylation.Clarketal.[4)reportedthatthecatalyticactivityofPiLL'Clz(L=PPh2,L'=S,N)ishigherthanthatofPtLZC12orPtL'ZC12inhydrosilylation.Inthispaper,wereportthesynthesisofanewacrylatete… 相似文献
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A modified method of preparing crown functionalized linear polysiloxane has been described.4'-allylbenzo-15-crown-5 was subjected to hydrosilylation with methyldichlorosilane,followed bypolycondensation with silanol-terminated polydimethylsiloxane to give the title crownfunctionalized linear polysiloxane. It was found that the polysiloxane could be coordinated withplatinum salt to form platinum complex, which could catalyze the hydrosilylation of olefins withtriethoxysilane efficiently. 相似文献
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A new type of crown functionalized polysiloxane, in which the crown moieties were incorporated into main chain, and its platinum complex were synthesized. The polysiloxane was synthesized from 3, 16-dihydroxy-1- thia - 5, 8, 11, 14- tetraoxacycloheptadecane via etheritication with ω-chloroundecene, followed by hydrosilylation with triethoxysilane, cohydrolysis with D_4, sequentially. Treating the polysiloxane with potassium cholroplatinite, the title complex was obtained. It was found that the platinum complex exhibited high catalytic activity in the hydrosilylation of olefins with triethoxysilane. 相似文献
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Four polymer-supported Fe-Co tetrametallic clusters have been prepared by ion exchange and ligand exchange. Their structures were characterized by IR, UV/visible diffuse reflectance spectra and elemental analysis, and by analogy with the reference cluster PhCH_2NMe_3FeCo_3 (CO)_2 . The four heterogenous clusters were efficient catalysts in the hydroformylation of 1-hexene, turnover numbers amounted to 823 —924 with the yield of 83.2—92.4% heptyl aldehydes and ratios of normal aldehyde to iso-aldehyde of 1.2—1.6, they are facilitated forming the normal aldehyde in comparison with the homogeneous analogue. For the polymer-supported clusters prepared by ion exchange, the polymer-cation parts had no obvious effect on the activity of the cluster anion. The polymer-phosphine substituted cluster prepared by ligand exchange was more stable than the clusters preparedby ion exchange. 相似文献