Die Synthese von cis‐ und trans‐[Fe(CN)2(CNtBu)4] in einer Eintopfreaktion aus Fe2(CO)9 und tert. Butylisocyanid

Abstract

AbstractSynthesis of cis‐ and trans‐[Fe(CN)2(CNtBu)4] in a One‐Pot Procedure from Fe2(CO)9 and tert. ButylisocyanideThe reaction of Fe2(CO)9 with tert. butyl isocyanide in the presence of 10 bar of carbon monoxide leads to the formation of the mononuclear trigonal bipyramidal compound [Fe(CO)3(CNtBu)2] with two axially coordinated isocyanide ligands. If the same reaction is carried out without additional carbon monoxide being present in the solution, a 1:1 mixture of the isomeric octahedral complexes cis‐ and trans‐[Fe(CN)2(CNtBu)4] is produced via a complex redox reaction involving the reductive cleavage of isocyanide ligands. The molecular structures of the product compounds is going to be discusssed. The crystal structures of cis‐ and trans‐[Fe(CN)2(CNtBu)4] are mainly determined by the ability of the cyano ligands to act as hydrogen bond acceptor sites.