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

ARCA, MASSIMILIANO;GARAU A;DEVILLANOVA FA;ISAIA, FRANCESCO;LIPPOLIS, VITO;VERANI G.

1999-01-01

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Abstract

The synthesis of the complex LSb(μ-I)2(μ-S)SbL (1) was accomplished by reacting antimony powder with diiodine activated by tetraphenyldithioimidodiphosphine (SPPh2NHPPh2S) (HL). X-ray diffraction (tetragonal, M = 1426.30, space group I 41/a (No. 88), Z = 8, a = 18.020(2) Å, c = 33.037(4) Å) shows that (1) is a dinuclear SbIII complex, in which the two metal ions are bridged by one sulphide and two iodide anions. An anionic bidentate L ligand completes the coordination sphere of each metal with its two sulphur atoms, leading to a slightly distorted pyramidal coordination geometry, since each metal ion shows the presence of a sterically active lone-pair in trans position to the bridging sulphide. 31P CP-MAS NMR and IR spectroscopies are in accordance with the structural features of the complex.