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Preparation, Properties, and Reactivity of (Aminoferrocenyl)(ferrocenyl)carbene(pentacarbonyl)chromium(0) as Bulky Isolobal Trimetallo‐amide

2015; Wiley; Volume: 641; Issue: 12-13 Linguagem: Inglês

10.1002/zaac.201500562

1521-3749

Philipp Veit, Christoph Förster, Sebastian Seibert, Katja Heinze,

N-Heterocyclic Carbenes in Organic and Inorganic Chemistry

Abstract Nucleophilic substitution of the ethoxy substituent in the Fischer carbene complex (ethoxy)(ferrocenyl)carbene(pentacarbonyl)chromium(0) ( 1 ) by ferrocenyl amide [Fc‐NH] – [2 ‐ H] – gives the hetero trimetallic complex (aminoferrocenyl)(ferrocenyl)carbene (pentacarbonyl)chromium(0) ( 3 ). As the Cr(CO) 5 fragment is isolobal to oxygen or sulfur 3 can be viewed as an isolobal metallo analogue to diferrocenylamide (Fc)(FcNH)C=O ( 4 ) and diferrocenylthioamide (Fc)(FcNH)C=S ( 5 ). The impact of the formal replacement of O/S by Cr(CO) 5 in 3 is studied with respect to steric and electronic consequences as well as reactivity by spectroscopic, diffraction, electrochemical and theoretical methods.