Diorganotin(IV) complexes of dideprotonated pyridoxine (PN, vitamin B 6). The crystal structures of [SnEt 2(PN–2H)] · CH 3OH, [SnEt 2(PN–2H)(DMSO)] and [SnBu 2(PN–2H)

Abstract

The reactions of dimethyl-, diethyl- and dibutyltin(IV) oxides with pyridoxine (PN) in toluene/ethanol led to the formation of compounds [SnR 2(PN–2H)] which were characterized by EI and FAB mass spectrometry and by IR, Raman, Mössbauer and 1H, 13C and 119Sn NMR spectroscopy. The structures of [SnEt 2(PN–2H)] · CH 3OH, [SnBu 2(PN–2H)] and [SnEt 2(PN–2H)(DMSO)] were determined by X-ray diffractometry. The first two contain dimeric [SnR 2(PN–2H)] 2 units in which two bridging-chelating pyridoxinate anions link the Sn atoms, while in [SnEt 2(PN–2H)(DMSO)] the DMSO coordinates to the tin atom via its O atom in a similar dimeric unit.