Synthesis and Spectroscopic Properties of the First Series of Heteronuclear Derivatives Containing Organosilicon/Organotin (IV) and Oxovanadium (V) Moieties

Me ₃ SiCl reacts with [VO(OGO)(OGOH)] ( 1a ) or [VO(L)(LH)] ( 1b ) (where OGO = OCMe ₂ CH ₂ CH ₂ CMe ₂ O and L = OC ₆ H ₄ CH═NCH ₂ -CH ₂ O) in the presence of Et ₃ N as a proton acceptor (1:1:1 stoichiometric ratio) in benzene to form heteronuclear derivatives [VO(OGO)(OGOSiMe ₃ )] ₂ ( 2 ) and [VO(L)(LSiMe ₃ )] ( 3 ), respectively. The reactions of Bu ₃ Sn(OPr ⁱ ) with a variety of oxovanadium(V) complexes ( 1a ), ( 1b ), and [VO(PhDEA)(PhDEAH)] ( 1c ) (in a 1:1 stoichiometric ratio, where PhDEA = C ₆ H ₆ N(CH ₂ CH ₂ O) ₂ ) afford derivatives [VO(OGO)(OGOSnBu ₃ )] ₂ ( 4 ), [VO(L)(LSnBu ₃ )] ( 5 ), and [VO(PhDEA)(PhDEASnBu ₃ )] ( 6 ), respectively. Derivatives [(Ph ₃ SiO) VO(OGO)] ₂ ( 7 ) and [(Ph ₃ SiO)VO(L)] ( 8 ) have been prepared by the equimolar reactions of Ph ₃ SiOH with [VO(OGO)(OPr ⁱ )] ( 1d ) and [VO(L)(OPr ⁱ )] ( 1e ), respectively. All these new derivatives have been characterized by elemental analyses, molecular weight measurements, and spectroscopic [IR, NMR ( ¹ H, ²⁹ Si, ⁵¹ V, and ¹¹⁹ Sn)] studies.

Keywords:

• Heteronuclear complexes
• organosilicon complexes
• organotin complexes
• oxovanadium(V) complexes

Financial support by the U.G.C. (to Anirudh Singh) and INSA (to the late Ram C. Mehrotra), New Delhi is gratefully acknowledged. Rajendra S. Ghadwal is grateful to the State Government of Rajasthan and the Department of Chemistry, University of Rajasthan, Jaipur, for a Fellowship under the Special Assistance Program.

Deceased (July 11, 2004)

Notes

^a All are solids.

^b Refers to recrystallised product.