Preparation and characterisation of dithiophosphinato-complexes of yttrium and the lanthanoids

Abstract
Hydrated lanthanoid(III) chlorides react with salts of dithiophosphinic acids in hot ethanolic solution to form the corresponding neutral tris or anionic tetrakis complexes, [Ln(S2PR2)3](R = C6H11) and [Ln(S2PR2)4](R = Me, OEt, or C6H11) respectively. The product of the reaction is sterically controlled. Displacement reactions with PPh3O to give mixed complexes are described. The characterisation, structures, and spectral properties of all the isolated complexes are discussed. The lanthanoid-sulphur bond is compared with transition-metal-sulphur bonds

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