Preparation, structure, and quantum chemical calculation of [C(NMe2)(3)](2)[(CO)(4)FeInCl3]

The title compound (1) has been obtained as colorless crystals by reacting InCl3 with [C(NMe2)(3)][(CO)(4)-FeC(O)NMe2] in THF solution. The crystal st ructure determination (monoclinic, C2/c) shows the presence of separate ion s with one disordered and one non disordered cation. In the dianion the CO groups of the trigonal bipyramidal coordinated iron atom and the Cl atoms o f the tetrahedral coordinated indium atom form a staggered conformation wit h a relatively short In-Fe bond distance of 252 pm Chemical DFT calculation s of [(CO)(4)FeInCl3](2-) show that the Fe-In bond has a strong ionic chara cter and that it should be considered as an adduct of [Fe(CO)(4)](2-) and I nCl3.