Metal-heterocyclic thione interactions-14. Synthesis and spectroscopic of ruthenium(II) complexes containing pyridine-2-thione and bis(tertiaryphosphines/phosphine sulphides)

Abstract

A series of ruthenium(II) complexes containing pyridine-2-thione (C₅H₅NS) and bis(tertiary phosphine/ phosphine chalcogenide) are described. The complexes of stoichiometry,

Ru (C₅H₄NS)₂ (L-L) {where L-L = Ph₂P-CH=CH-PPh2 (dppen-PP)(<b>1</b>) Ph₂P-CH₂-P(S)Ph₂ (dppm-PS) (<b>2</b>), Ph₂P-CH₂- CH₂-P(S)Ph₂ (dppe-PS) (<b>3</b>) and Ph₂P(S)-CH₂-CH₂ P(S)Ph₂ (dppe-SS (dppe-SS) (<b>4</b>)) are formed by the replacement of PPh₃ from Ru (C₅H₄NS)₂ (PPh₃)₂ using a bis(tertiary phosphine) ligand in the presence of Et₃N base in dry toluene under dry nitrogen. All these compounds have been characterised by analytical data, IR and NMR (¹H and ¹³C) spectroscopy. Octahedral structures are suggested for the complexes in which diphosphines and pyridine- 2- thiolate are chelating.