S. Mathur et al., SYNTHESIS, REACTIONS AND SPECTROSCOPIC STUDIES OF SOME NOVEL HETERO (BI AND TRI)METAL ALKOXIDES OF TIN(IV) WITH NIOBIUM AND TANTALUM, Indian journal of chemistry. Sect. A: Inorganic, physical, theoretical & analytical, 32(7), 1993, pp. 585-588
Novel (chloro)isopropoxo niobates and -tantalates of tin(IV) with the
formulae Cl4-nSn{M(OPri)6}n, (n = 1 - 3) have been synthesized by the
reactions of SnCl4 with an appropriate potassium hexaisopropoxometalla
te, KM(OPri)6 (M = Nb/Ta) in the required molar ratios. These chloro p
recursors have been used to obtain derivatives of the types (RO)2Sn{M(
OPri)6}2 (R = Me, Pr(i), Bu(t)), {Ta(OPri)6}2Sn{Nb(OPri)6}2 and {Al(OP
ri)4}ClSn{Nb(OPri)6}2 by the replacement reaction of the chloride with
appropriate potassium alkoxide or isopropoxometallate. Characterizati
on of these novel complexes has been carried out on the basis of eleme
ntal and alkoxo group analyses, IR and multinuclear (H-1, C-14, Al-27
and Sn-119) NMR data and molecular weight studies.