STRUCTURES OF TRICHLOROBIS(N,N,N',N'-TETRAMETHYLUREA)INDIUM(III) AND TRICHLOROBIS(N,N,N',N'-TETRAMETHYLTHIOUREA)INDIUM(III)

(1) Trichlorobis(N,N,N',N'-tetramethylurea)indium (III), [InCl3(C10H24N4O2)], M(r) = 453.3, monoclinic, C2/c, a = 18.687 (3), b = 8.112 (2), c = 17.929 (2) angstrom, beta = 134.91 (2)degrees, V = 1924.8 angstrom 3, Z = 4, D(x) = 1.56 g cm-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 17.5 cm-1, F(000) = 912, R = 4.1% for 1595 reflections. (2) Trichlorobis(N,N,N',N'-tetramethylthiourea)indium(III), [InCl3(C10H24N4S2)], M(r) = 485.3, monoclinic, P2/c, a = 15.182 (9), b = 8.469 (1), c = 20.519 (4) angstrom, beta = 131.66 (4)degrees, V = 1971.0 angstrom 3, Z = 4, D(x) = 1.64 g cm-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 19.1 cm-1, F(000) = 976, R = 4.32% for 2705 reflections. In each compound the structures consist of discrete five coordinate molecules, with each molecule having a twofold axis coincident with an In-Cl bond. The first coordination sphere about the In atom in each molecule may be regarded as distorted trigonal bipyramidal. For (1) the 'axial' direction is O(1)-In-O(1A) (171.0-degrees) whereas for (2) the 'axial' direction is Cl-In-Cl (average 169.7-degrees for the two crystallographically independent molecules).