content P(m), with M(n) in the range 700-1900 Dalton, and polydispersities between 1.22 and 1.64. The cationic complexes 4a-b and 5a-b are also effective catalyst precursors for the hydrosilylation reactions of styrene or 4-methylstyrene with PhSiH(3) in 1,2-dichloroethane at 40 degrees C using an olefin/catalyst ratio equal to 100, leading selectively to RC(6)H(4)CH(SiH(2)Ph)CH(3) (R = H, CH(3)) in
配合物[Ni(eta(3)-CH(2)CHCH(2))Br(kappa(1)P-PR(2)CH(2)CH = CH(2))](R = Ph 1,( i)Pr2)和[Ni(eta(3)-CH(2)C(R')CH(2))(kappa(1)P-PR(2)CH(2)CH = CH(2))( 2)] [BAr'(4)](R'= H,R = Ph 4a,R =(i)Pr 4b; R'= CH(3),R = Ph 5a,R =(i)Pr 5b;已经制备并表征了Ar'= 3,5-C(6)H(3)(CF(3))(2))。已经确定了1、2和5b的X射线晶体结构。4a-b和5a-b是RC(6)H(4)CH = CH(2)齐聚为低聚
苯乙烯(R = H)或低聚(4-
甲基苯乙烯)(R = CH(3))的催化剂前体不需要助催化剂如甲基铝氧烷。催化活性从中到高不等。该低聚反应是在25至40摄氏度的温度范围内于1,2-二
氯