SYNTHESIS OF OCTAHEDRAL RHENIUM CLUSTER CHALCOBROMIDES RE6X4BR10 AND RE6X8BR2 (X=S, SE, TE) BY CONDENSATION FROM TRIANGULAR RHENIUM BROMIDERE3BR9

A new high yield (75-95%) method-condensation of polyhedral clusters-f or synthesis sf octahedral rhenium cluster compounds Re6X4Br10 and Re6 X8Br2 (X = S, Se, Te) has been developed using triangular cluster rhen ium bromide Re3Br9 and lead or cadmium chalcogenides as starting mater ials. The phases obtained were characterized by chemical analysis and X-ray powder diffraction method, and the cell unit parameters of compo unds were found. The crystal structure of Re6Te4Br10 was solved by X-r ay single crystal analysis. Crystallographic data: triclinic, space gr oup P (1) over bar, a = 9.347(2), b = 9.403(4), c = 13.348(4) Angstrom , alpha = 84.46(3), beta = 84.64(2), gamma = 82.11(2)degrees, V = 1152 .8(6) Angstrom(3), Z = 2, D-x = 6.991 g.cm(-3) R(F) = 0.0378, wR(F-2) = 0.0906. (C) 1997 Elsevier Science Ltd.