LSb(mu-I)(2)(mu-S)SbL: a neutral triply bridged complex obtained from Sb powder and diiodine activated by tetraphenyldithioimidodiphosphine (HL)

The synthesis of the complex LSb(mu-I)(2)(mu-S)SbL (1) was accomplished by reacting antimony powder with diiodine activated by tetraphenyldithioimidod iphosphine (SPPh2NHPPh2S) (HL). X-ray diffraction (tetragonal, M = 1426.30, space group I 4(1)/a (No. 88), Z = 8, a = 18.020(2) Angstrom, c = 33.037(4 ) Angstrom) shows that (1) is a dinuclear Sb-III complex, in which the two metal ions are bridged by one sulphide and two iodide anions. An anionic bi dentate L ligand completes the coordination sphere of each metal with its t wo sulphur atoms, leading to a slightly distorted pyramidal coordination ge ometry, since each metal ion shows the presence of a sterically active lone -pair in trans position to the bridging sulphide. P-31 CP-MAS NMR and IR sp ectroscopies are in accordance with the structural features of the complex.