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DOI: 10.1055/s-0031-1289559
The Hieber Anion [Fe(CO)3(NO)]-
Publikationsverlauf
Publikationsdatum:
25. Oktober 2011 (online)
Introduction
Transition metals are a cornerstone in organic chemistry and their application both as stoichiometric reagents and catalysts has gained much attention. Increased efforts towards economically and ecologically benign processes have put the spotlight on readily available and non-toxic metals, such as iron. Among these is the iron complex [Fe(CO)3(NO)]-, also referred to as a Hieber anion. [¹] The Bu4N salt may be easily prepared from Fe(CO)5, NaNO2, and Bu4NBr (Scheme [¹] ). [²] Nucleophilic attack of the nitrite onto a CO ligand forms putative intermediate 2 which results in 1 upon extrusion of CO and CO2 causing a reduction of the iron center.
Scheme 1 Preparation of Bu4N[Fe(CO)3(NO)]
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