OCTAHEDRAL CLUSTERS IN MOLYBDENUM(II) AND RHENIUM(III) CHALCOHALIDE CHEMISTRY

A number of molybdenum(II) or rhenium(III) octahedral cluster compounds, mainly in chalcohalide solid state chemistry, are reported. As shown by single-crystal structure determinations, all these compounds contain (Me//6L//8**i)L//6**a units which progressively condense when halogen ligands are substituted by chalcogen ligands according to Schaefer's scheme. The physical properties are discussed in relation to the crystal structures and to electronic band structures determined by recent theoretical calculations.