Synthesis and crystal structures of new triangle tungsten telluride compounds containing a [W-3(mu(3)-Te)(mu(2)-Te-2)(3)](4+) cluster core: {W3Te7[(RO)(2)PS2](3)}I (R = Et, Pr-i)

Two complexes. W3Te7[(EtO)(2)PS2](3)I (1) and W3Te7[ ((PrO)-O-i)(2)PS2](3)I (2), were prepared via solid state reaction of (RO)(2)PS2K with a product of high temperature reaction of elemental W, Te and I-2. The structures of the two compounds have been determined by X-ray crystallography. Crystal da ta are 1: monoclinic, P2(1)/c, Z = 4, a = 14.3862(3), b = 16.2114(1), c = 1 8.9766(2) Angstrom, beta = 111.655(1)degrees, V = 4113.37(10) Angstrom(3), Z = 4, D-c = 3.435 Mg/m(3); 2: monoclinic, P2(1)/n, Z = 4, a = 14.6197(3), b = 23.9630(1), c = 15.1249(3) Angstrom, beta = 113.688(1)degrees, V = 4852 .28(14) Angstrom(3), Z = 4, D-c = 3.027 Mg/m(3). The results of both the co mplexes present the first examples of a cluster containing a [W-3(mu(3)-Te) (mu(2)-Te-2)(3)](4+) core. (C) 2000 Elsevier Science S.A. All rights reserv ed.