Crystal Structures of Manganese(II) and Iron(II) Chloride Dihydrate

Abstract
The crystal structures at 298°K of MnCl2·2H2O and FeCl2·2H2O have been refined by means of three‐dimensional differential syntheses using diffractometer single‐crystal x‐ray‐intensity data. The crystal structures of these isomorphic compounds consist of polymeric chains of metal and chlorine ions arranged in a near‐square planar configuration with each chlorine ion shared by two metal ions. The water molecules which fill the remaining octahedral positions about the metal ion link adjacent chains, paralleling the c axis, by hydrogen bonds.