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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.
It is reported here that silica-supported triphenylphosphine platinum complex poly-γ- (m-diphenylphosphinophenyl) propylsiloxane platinum complex is subjected to hydrosilylation with trimethoxysilane and an unsaturated compound The catalytic properties of the reaction are as follows: 1-hexene, 1-decene, 1-dodecene, phenylallyl ether and omega- Chlorododecene smoothly and hydrosilylation reaction with trimethoxysilane at 60 or 40 ° C, the only end-products were obtained, the yield was above 85%, and its catalytic activity in the initial reaction of less than four (Triphenylphosphine) platinum, but the latter reaction rate and the rate of hydrosilylation are higher.Experiments show that poly (γ- (m-diphenylphosphinophenyl) propylsiloxane and tetrakis (triphenylphosphine) platinum The platinum complex (1) prepared by the reaction has a higher catalytic activity than the platinum complex (Ⅱ) obtained by the reaction with chloroplatinic acid, and secondly, the reaction atmosphere has a decisive influence on the hydrosilylation reaction.In the air atmosphere , The hydrosilation reaction proceeds smoothly; in a nitrogen atmosphere, no reaction occurs.