Synthesis and Characterization of Five-co-ordinate Rhenium(III) Complexes with 2-(Diphenylphosphino)ethanethiolate and Monothiolate Ligands. Crystal Structure of

Article abstract of DOI:10.1039/DT9940002437

A new series of five-co-ordinate rhenium(III) complexes containing the mixed S,P-bidentate 2-(diphenylphosphino)ethanethiolate ligand together with a monothiol RSH have been synthesized and characterized.This Re(III)P2S3 series was prepared by substitution reactions of , a pre-reduced rhenium(III) precursor, by addition of 2-(diphenylphosphino)ethanethiol and the corresponding monothiol.Formation of these compounds was verified by elemental analysis and 1H and 31P NMR and positive-ion fast atom bombardment mass spectroscopy.The complexes were found to be diamagnetic, neutral and stable.They exhibit a trigonal-bipyramidal geometry, where three sulfur atoms occupy the equatorial plane and two phosphorus atoms are positioned at the apices.The X-ray structural analysis of bis<2-(diphenylphosphino)ethanethiolato-κS,κP>(phenylmethanethiolato-κS)rhenium(III) revealed that this compound crystallizes in the monoclinic space group P2₁/c with Z=8, a=21.011(9), b=20.397(9), c=16.289(7) Angstroem, β=107.13(5) deg, R=0.050, R'=0.063, by using 5644 observed reflections.The above data further demonstrate the preference of a five-co-ordinate configuration when the P2S3 donor-atom set is available for co-ordinating rhenium(III).

Full text of DOI:10.1039/DT9940002437

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