DIORGANOTHALLIUM(III) DIETHYLDITHIOPHOSPHINATES - CRYSTAL AND MOLECULAR-STRUCTURES OF [TLME2(S2PET2)] AND [TLPH2(S2PET2)]

The compounds [TlR2(S2PEt2)] (R = Me or Ph) were synthesized by reacti on of the corresponding hydroxide TlR2(OH) with NaS2PEt2 . 2H(2)O and characterized by X-ray crystallography, In both structures thallium is coordinated to the two sulfur atoms of the diethyldithiophosphinato l igand and to two carbon atoms of organyl groups. The chelate ring, TlS 2P, lies on a crystallographic plane of symmetry. Weak intermolecular interactions with one of the sulfur atoms of a neighbouring molecule m ake the coordination number of the thallium atom up to five. The vibra tional and H-1, C-13, 31(P) and (TlNMR)-Tl-205 spectra of these compou nds are also discussed. (C) 1997 Elsevier Science Ltd.