The structure and fluxionality of [Fe3(CO)10(dppe)];: a merry-go-round with no sense of direction

被引：8

作者：

Adams, H

Agustinho, SCM

Mann, BE ^{[1
]}

Smith, S

机构：

[1] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2000年 / 607卷 / 1-2期

基金：

巴西圣保罗研究基金会;

关键词：

fluxionality; iron clusters; carbonyl phosphines;

D O I：

10.1016/S0022-328X(00)00335-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The crystal structure of [Fe-3(CO)(10)(dppe)] has been determined. The Ph2PCH2CH2PPh2 ligand bridges the Fe(mu-CO)(2)Fe edge and is markedly non-planar. The non-planarity inverts with Delta G(211)(double dagger) = 48.4 +/- 0.5 kJ mol(-1). The carbonyls on the bridged iron atoms exchange with the axial ones by the merry-go-round mechanism with Delta G(195)(double dagger) = 43.4 +/- 0.5 kJ mol(-1). Despite the non-planar dppe ligand producing a chiral molecule, the merry-go-round exchange goes with equal rate in both directions. This is the first example of a six-toothed failed ratchet. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：175 / 181

页数：7

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