New families of ternary molybdenum (II) chlorides with octahedral Mo6 clusters

A number of new ternary molybdenum +II chlorides have been synthesized by solid state chemistry methods. These compounds belonging to three families −MIIMo6Cl14, MI2Mo6Cl14 and MIMo6Cl13− are characterized by X-ray data and their main structural features are reported. All these compounds are built from (Mo6Cl8)Cl6 units including octahedral Mo6 clusters. In the first family, these units are linked together by M2+ ions in octahedral Cl6 sites whereas in the second one, the cationic sites (M2Cl6) are splitted or distorted. In the third family, the units are linked together along one direction of space by chlorine bridges and the M+ ions lie in quasi tetrahedral sites.