The rates of syn−anti isomerization in a series of cationic π-allylpalladiumcomplexes [Pd(η3-Me2CCHCHD)(bisphosphine)]BArF4 [ArF = 3,5-(CF3)2C6H3] were measured by 1H NMR spin-saturation transfer techniques. For the complexes with α,ω-bis(diphenylphosphino)alkanes (Ph2P(CH2)nPPh2, n = 2−4), a correlation between the bisphosphine's bite angles and the syn−anti isomerization rates was observed, the
的速率顺-反一系列阳离子π烯丙基钯配合物的异构化的将Pd(η 3 -Me 2 CCHCHD)(双膦)] BAR ˚F 4 [氩˚F = 3,5-(CF 3)2 C ^ 6 ħ 3通过1 H NMR自旋饱和转移技术测量。对于具有α,ω-双(二苯基膦基)烷烃(Ph 2 P(CH 2)n PPh 2,n = 2-4)的配合物,双膦的咬合角与syn - anti之间存在相关性观察到异构化速率,具有较小咬合角的双膦加速了顺-反异构化。异构化速率还取决于双膦配体的电子特性。的取代的配位体DPPF(FE(η 5 -C 5 H ^ 4 PAR 2)2中,Ar = 4-CF 3 C ^ 6 ħ 4,pH值,4-MeOC 6 H ^ 4),它与最快的吸电子4 -CF 3 C 6 H 4基团,电子释放最慢的4-MeOC 6 H 4磷原子上的基团。这些双膦用作(Z)-肉桂酸乙酸酯和(Z)-2-己烯基乙酸酯与甲基丙