Synthesis and spectroscopic properties of the first series of heteronuclear derivatives containing organosilicon/organotin (IV) and oxovanadium (V) moieties

Abstract

Me₃SiCl reacts with [VO(OGO)(OGOH)] (1a) or [VO(L)(LH)] (1b) (where OGO = OCMe₂CH₂CH₂CMe₂O and L = OC₆H₄CH-NCH₂-CH₂O) in the presence of Et₃N as a proton acceptor (1:1:1 stoichiometric ratio) in benzene to form heteronuclear derivatives [VO(OGO)(OGOSiMe₃)]₂ (2) and [VO(L)(LSiMe₃)] (3), respectively. The reactions of Bu₃Sn(OPrⁱ) with a variety of oxovanadium(V) complexes (1a), (1b), and [VO(PhDEA)(PhDEAH)] (1c) (in a 1:1 stoichiometric ratio, where PhDEA = C₆H₆N(CH₂CH₂O)₂) afford derivatives [VO(OGO)(OGOSnBu₃)]₂ (4), [VO(L)(LSnBu₃)] (5), and [VO(PhDEA)(PhDEASnBu₃)] (6), respectively. Derivatives [(Ph₃SiO) VO(OGO)]₂ (7) and [(Ph₃SiO)VO(L)] (8) have been prepared by the equimolar reactions of Ph₃SiOH with [VO(OGO)(OPrⁱ)] (1d) and [VO(L)(OPrⁱ)] (1e), respectively. All these new derivatives have been characterized by elemental analyses, molecular weight measurements, and spectroscopic [IR, NMR (¹H, ²⁹Si, ⁵¹V, and ¹¹⁹Sn)] studies.