BITE ANGLE DEPENDENCE OF THE RATE OF REDUCTIVE ELIMINATION FROM DIPHOSPHINE PALLADIUM COMPLEXES

被引：112
作者：
BROWN, JM
GUIRY, PJ
机构：
[1] Dyson Perrins Laboratory, Oxford, OX1 3QY, South Parks Road
来源：
INORGANICA CHIMICA ACTA | 1994年 / 220卷 / 1-2期
关键词：
BITE ANGLE; REDUCTIVE ELIMINATION; PALLADIUM COMPLEXES; ALKYL COMPLEXES; DIPHOSPHINE COMPLEXES;
D O I：
10.1016/0020-1693(94)03876-7
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The thermal stability of a set of complexes of the type P2PdMeR, generated in situ, has been investigated in the temperature range -30-degrees-C to ambient, with the intention of determining the relationship between the ligand bite angle and reactivity in reductive elimination. In this series P2 Was either 1,3-(diphenylphosphino)propane (dppp), 1,1'-(diphenylphosphino)ferrocene (dppf) or 1,1'-(diphenylphosphino)ruthenocene (dppr), and R was phenyl or E-2-(4-methoxyphenyl)ethenyl. Clear trends were observed; the dppp complexes were much more stable than the others, and the phenylpalladium complexes were more stable than their vinylpalladium counterparts. The observed trends fit with the idea that the reductive elimination step in palladium cross-coupling is facilitated by a ligand with a large interchelate angle. The dppr complexes were significantly more labile than their dppf analogues.
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页码：249 / 259
页数：11
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