rates of the reactions are enhanced with increasing electron donor capacity of the sulfoxides, and there is a small but significant E(ar) effect that enhances the reactivity of the aryl sulfoxides. The strict similarity of the patterns of the two processes and of their dependence upon the stereoelectronic properties of the ligands, combined with the intrinsic lability of the platinum-nitrogen bonds
将外部弱亲核试剂添加到阳离子络离子[Pt(Me)(dmphen)(PPh(3))](+)(1)的
氯仿溶液中可加快对称螯合
配体2,9-二甲基-的通量运动非等价交换位点之间的1,10-
菲咯啉(dmphen)。动态过程的速率可以通过(1)H NMR谱的线形分析来测量。使用
配体SOMe(2),SO(CH(2))(4),SO(n-Bu)(2),SO(sec-Bu)(2),SO(i- Pr)(2),SOEt(Ph),SOPr(Ph),SO(Bz)(2),SO(p-MeC(6)H(4))(2),SOPh(2),SO(p- ClC(6)H(4))(2),SOMe(p-MeOC(6)H(4)),SOMe(p-MeC(6)H(4)),SOMe(Ph),SOMe(p- BrC(6)H(4))和SOMe(p-ClC(6)H(4))。相对于添加的
配体SOR(R')的浓度作图时,速率常数k(obsd)给出了一系列具有