CRYSTAL-STRUCTURE OF DODECAPHENYLCYCLOHEXAGERMANE.5BENZENE

A new modification of the title compound was obtained by the recrystallization from benzene solution. The crystal structure has been determined by X-Ray diffraction: Crystal data; Ge6(C6H5)12 . 5(C6H6), M(W) = 1741.39, P1BAR, a. = 15.438 (3) angstrom, b = 16.636 (3) angstrom, c = 19.111 (2) angstrom, alpha = 74.90 (1)-degrees, beta = 70.29 (2)-degrees, gamma = 71.37(1)-degrees, Z = 2, R = 0.054, R(w) = 0.046 for 9592 observed (\F(o)\ greater-than-or-equal-to 3sigma(\(F(o)\)) reflections. There are two Ge6Ph12 molecules, both having a center of symmetry. The cyclohexagermane rings adopt chair conformations. As for the molecular packing, the dihedral angle between the 6-membered Ge ring and that of the nearest neighbor is 58-degrees. The packing is different from that of the Ge6Ph12 . 7-benzene and the Ge6Ph12 . 2toluene.