Synthesis and characterization of new organotin(IV) complexes with polyfunctional ligands

Abstract

New mono-, di- and tri-organotin(IV) derivatives containing the neutral bis(2-pyridylthio)methane ligand, [(pyS) 2CH 2] and tris(2-pyridylthio)methane ligand, [(pyS) 3CH] have been synthesized from reaction with SnR n Cl 4− n (R = Me, n Bu, Ph and Cy, n = 1–3) acceptors. Mono-nuclear adducts of the type {[(pyS) 2CH 2]R n SnCl 4− n } and {[(pyS) 3CH]R n SnCl 4− n } have been obtained and characterized by elemental analyses, FT-IR, ESI-MS, multinuclear ( 1H and 119Sn) NMR spectral data. The 1H and 119Sn NMR and ESI-MS data suggest for the triorganotin(IV) derivatives a complete dissociation of the compounds in solution. The mono- and di-organotin(IV) derivatives show a greater stability in solution, and their spectroscopic data are in accordance with the existence of six-coordinated RSnCl 3N 2 or R 2SnCl 2N 2 species.