Kinetic and mechanistic study of the displacement of η2-coordinated arenes from Cp*Re(CO)2(η2-C6H5R) (R = H, CH3, C(CH3)3):: Evidence for a dissociative mechanism and estimation of the Re-(η2-arene) bond strength

被引：14

作者：

Bengali, AA ^{[1
]}

Leicht, A ^{[1
]}

机构：

[1] Dickinson Coll, Dept Chem, Carlisle, PA 17013 USA

来源：

ORGANOMETALLICS | 2001年 / 20卷 / 07期

关键词：

D O I：

10.1021/om0010464

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The displacement of the arene molecule from Cp*Re(CO)(2)(eta (2)-arene) (arene = benzene, toluene, tert-butylbenzene) by pyridine in heptane solution is studied. The rate constants for arene dissociation from the Re center are found to vary in the order Cp*(CO)(2)Re-(eta (2)-toluene) < Cp*(CO)(2)Re-(<eta>(2)-benzene) approximate to Cp*(CO)(2)Re-(eta (2)-tert-butylbenzene) and are a function of the steric and electronic properties of the arene substituents. Activation parameters yield a lower limit of 19-21 kcal/mol for the Cp*(CO)(2)Re-(eta (2)-arene) bond strength.

引用

页码：1345 / 1349

页数：5

共 19 条

[1] Observation of the (η5-C5H5)Mn(CO)2(toluene) complex by low-temperature IR spectroscopy and determination of the manganese -: Toluene bond strength [J].