THE INDENYL EFFECT ON ETHYLENE ROTATION IN IRIDIUM(I) COMPLEXES

被引：48

作者：

SZAJEK, LP ^{[1
]}

LAWSON, RJ ^{[1
]}

SHAPLEY, JR ^{[1
]}

机构：

[1] UNIV ILLINOIS,SCH CHEM SCI,URBANA,IL 61801

来源：

ORGANOMETALLICS | 1991年 / 10卷 / 01期

关键词：

D O I：

10.1021/om00047a074

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new iridium(I) ethylene complexes (eta-5-C5H5)Ir(eta-2-C2H4)CO (1b) and (eta-5-C9H7)Ir(eta-2-C2H4)CO (2b) have been prepared. For these complexes, as well as for (eta-5-C5H5)Ir(eta-2-C2H4)2 (1a) and (eta-5-C9H7)Ir(eta-2-C2H4) (2a), the barrier to ethylene rotation about the iridiumethylene bond axis has been determined by line-shape fitting of variable-temperature H-1 NMR spectra. The free energies of activation were found to be 5-6 kcal/mol less for the idenyl complexes than for the corresponding cyclopentadienyl complexes (ca. 14 and 20 kcal/mol, respectively).

引用

页码：357 / 361

页数：5

共 46 条

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