highest reactivity to its derivative (complex 1A). The most surprising issue was however represented by the olefin which seems to affect heavily the reactivity of the starting substrate thereby increasing the overall reaction rate. The most active olefins were ma and fn. In the case of the reaction between the complex 1A and tributyl-phenylethynyl-stannane in the presence of fn an exhaustive kinetic study
关于
钯丁二烯基配合物[PdCl((ZC
CZ)2 Me)(LL')](Z = COOMe; LL'= MeN-
SPh(1A),N-
SPh(1B),
DPPQ-在一些稳定烯烃(ma,fn,nq,dmfu和tmetc)存在下,进行了Me(1C),BiPy(1D),
DPPE(1E))和三丁基-苯基
乙炔基-
锡烷。关于反应速度对辅助
配体性质的依赖性,根据供体能力和
配体的空间特性进行了讨论。已经注意到,在其他条件相同的情况下,连接的扭曲的MeN-
SPh
配体对其衍
生物具有最高的反应性(复合物1A)。但是,最令人惊讶的问题是烯烃,它似乎在很大程度上影响起始底物的反应性,从而提高了总反应速率。活性最高的烯烃是ma和fn。在络合物1A与三丁基-苯基
乙炔基-
锡烷在fn存在下反应的情况下,进行了详尽的动力学研究,并提出了机理假说。