Synthesis, structural evolution, and electrical properties of the novel Mo12 cluster compounds K(1+x)Mo12S14 (x = 0, 1.1, 1.3, and 1.6) with a tunnel structure.

The new structural type (1) K(2.3)Mo12S14 was prepared by solid-state reaction at 1500 degrees C in a sealed molybdenum crucible. The compound crystallizes in the trigonal space group P1c, Z = 2, (1) a = 9.

Synthesis, Structural Evolution, and Theoretical and Physical Studies of the Novel Compounds M(2)Mo(9)S(11) (M = K, Rb) and Related Metastable Materials Cu(x)()K(1.8)Mo(9)S(11) (x = 0 or 2) Containing Bioctahedral Mo(9) Clusters.

The new isostructural K(2)Mo(9)S(11) and Rb(2)Mo(9)S(11) phases were prepared by solid-state reaction at 1500 degrees C in a sealed molybdenum crucible. Both compounds crystallize in the trigonal space group (SG) R&thremacr;c, Z = 6, a = 9.271(1) Å, c = 35.

RbMoS: A Novel Reduced Molybdenum Sulfide Containing the Highest Nuclearity Metal Transition Cluster in a Solid-State Compound.

The sixth member of the family of MMoX structures (M=Rb, Cs; X=S, Se, Te), which contains Mo clusters, is represented by RbMoS. The Mo cluster present in the title compound results from the uniaxial trans face sharing of eleven Mo octahedra, and forms a MoS cluster unit with 44 sulfur atoms of its environment (38 inner, 6 outer ligands). The large cavities between these units are occupied by the Rb ions, which form linear finite chains.