Octahedral Molybdenum Cluster Cyanide Complexes with Selenide and Halide Ligands in the Cluster Core

The molybdenum and rhenium octahedral cluster chalcohalides in solid state chemistry: From condensed to discrete cluster units

“…In fact the starting composition can be as well a mixture of MoSe 2 and Mo, for instance, and starting from various mixtures, the above mentioned ions were obtained as well as K 6 [(Mo 6 Se i 8 )(CN) a 4 (CN) a-a 2/2 ], which is a chain-based compound [156]. True Mo 6 chalcohalides have also been converted to chalcohalocyanides, but again by exchange in aqueous medium, giving the ions [(Mo 6 Q i 2 Br i 6 )(CN) a 6 ] 4À [112] and the [(Mo 6 Se i 3 X i 5 )(CN) a 6 ] 5À /[Mo 6 Se i 4 X i 4 (CN) a 6 ] 5À solid solution although the intermediate chalcohalide implied in the reaction was not actually isolated [157].…”

Synthesis and Structures of Compounds Based on Chalcocyanide Tetranuclear Rhenium Clusters: Bonding Cluster Complexes by diene‐Bridged CuII Units

“…Transition metal atoms in such complexes are coordinated by the N atoms of the cyanide ligands and by the N or O atoms, respectively, of ammonia and water molecules. Recent work [14] has shown that some of the coordination sites around the transition metal atom may effectively be blocked by bidentate ligands such as ethylenediamine.…”

“…The first examples of such complexes were published recently. [14] Here we present six complexes containing [Re 4 Q 4 (CN) 12 ] 4Ϫ cluster anions and Cu II cations, coordinated by dien ligands and bridging CN ligands of the cluster units. Our data demonstrate the significant dependence of the stoichiometry and structure of the product on the reaction conditions and…”