active single-component catalyst systems for the perfectly alternating C2H4/CO copolymerization in aprotic solvents. Stoichiometric model reactions provide insight into the mechanism, suggesting that insertion of carbon monoxide into the carbon−palladium(II) bond initiates the catalytic cycle.
通式为[ o -C 6 H 4(CH 2)N(R)2 Pd(P⌒P)}] [X]的阳离子四环铝环(P⌒P= Ph 2 P(CH 2)3 PPh 2, (PhCH 2)2 C(CH 2 PPh 2)2; X = Cl,PF 6,B(C 6 H 5)4; R = H,CH 3,CH 2 C 6 H 5)和[ o-( CH 2)C 6 H 4P(邻-Tol)2 Pd(P⌒P)}] [X](P⌒P= Ph 2 P(CH 2)3 PPh 2; X = Cl,PF 6)的制备和结构表征情况(X = PF 6的X射线结构分析,R = CH 3)。它们在溶液和固态下均耐空气和湿气,代表了C 2 H 4完美交替的最具活性的单组分催化剂体系之一/ CO在非质子传递溶剂中共聚。
化学计量模型反应提供了对该机理的了解,表明
一氧化碳插入碳-
钯(II)键可启动催化循环。