Diorganothallium(III) diethyldithiophosphinates : Crystal and molecular structures of [TlMe2(S2PEt2)] and [TlPh2(S2PEt2)]

Article abstract of DOI:10.1016/S0277-5387(97)00109-5

The compounds [TlR₂(S₂PEt₂)] (R = Me or Ph) were synthesized by reaction of the corresponding hydroxide TlR₂(OH) with NaS₂PEt₂·2H₂O and characterized by X-ray crystallography. In both structures thallium is coordinated to the two sulfur atoms of the diethyldithiophosphinato ligand and to two carbon atoms of organyl groups. The chelate ring, TlS₂P, lies on a crystallographic plane of symmetry. Weak intermolecular interactions with one of the sulfur atoms of a neighbouring molecule make the coordination number of the thallium atom up to five. The vibrational and ¹H, ¹³C, ³¹P and ²⁰⁵Tl NMR spectra of these compounds are also discussed.