Syntheses, properties, and X-ray crystal structures of piano-stool iron complexes bearing an N-heterocyclic carbene ligand

被引:89
作者
Buchgraber, P
Toupet, L
Guerchais, W
机构
[1] Univ Rennes 1, Inst Chim, CNRS, UMR 6509, F-35042 Rennes, France
[2] Univ Rennes 1, Grp Mat Condensee, CNRS, UMR 6626, F-35042 Rennes, France
关键词
D O I
10.1021/om034056o
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Piano-stool iron complexes containing the C-C unsaturated IMes or saturated H-2-IMes ligand are readily synthesized from [CpFe(CO)(2)(I)]- Substitution of the iodide ligand affords the cationic species [CpFe(CO)(2)-(L)][[I] (1a(+)I(-)) and (1b(+)I(-)) (a, L = IMes, b, L = H-2- IMes), subsequent decarbonylation of which yields the neutral iodo derivatives 2a,b. Cyclic voltammetry studies of 2a,b show a reversible one-electron oxidation to the corresponding 17-electron radical cation. The mono(acetonitrile) complexes 3a,b are obtained from UV irradiation of la,b(+)PF(6)(-) in CH3CN, but displacement of the second CO ligand is inhibited by strong metal-CO pi-back-donation.
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收藏
页码:5144 / 5147
页数:4
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