Preparation and reactions of some new isocyanide complexes of iron(II)

Abstract

The preparation of FeCl₂(ArNC)₄(ArNC =p-MeO·C₄H₃·NC) is reported and its reactions with SnCl₂, HgCl₂, NaClO₄, and [Et₄N]Cl have been investigated. 1 : 1 and 1 : 2 Adducts are formed with SnCl₂ and these are octahedral complexes containing SnCl₃ groups as ligands. A 1 : 1 adduct is formed with HgCl₂ which is extensively ionised in solution, probably to give [FeCl(S)(ArNC)₄]⁺HgCl₃^–(S = Solvent). Cationic complexes of the type [FeCl(L)(ArNC)₄]⁺(L = CO, ArNC) have been prepared, also [Fe(SnCl₃)(ArNC)₅]⁺ which is the first cationic complex containing SnCl₃ as a ligand.