Di- and tri-organotin(IV) complexes of the new bis(1-methyl-1H-imidazol-2-ylthio) acetate ligand and the decarboxylated analogues

The new sodium bis(1-methyl-1H-imidazol-2-ylthio) acetate, Na[(S-tim)(2)CHCO(2)], has been prepared in ethanol solution using 2-mercapto-1-methylimidazole, dibromoacetic acid and NaOH. New di- and tri-organotin(IV) derivatives have been synthesized from reaction between SnR(n)Cl(4-n) (R = Ph, Cy and (n)Bu, n = 2-3) acceptors and Na[(S-tim)(2)CHCO(2)]. Complexes of the type {[kappa(1)O-(S-tim)(2)CHCO(2)]SnR(3)} and related decarboxylated species {[kappa(2) N, N-(S-tim)(2)CH(2)]SnR(2)Cl(2)} have been obtained and characterized by elemental analyses, FT-IR, ESIMS and multinuclear ((1)H, (13)C and (119)Sn) NMR spectral data. The adduct {kappa(1)O-[(S-tim)(2)CHCO(2)]Sn(H(2)O)(C(4)H(9))(3)} was characterized by single crystal X-ray studies. The dichloromethane reaction solution of {kappa(1)O-[(S-tim)(2)CHCO(2)]Sn(C(6)H(5))(3)} was re-crystallized and the decarboxylated species {[(S-tim)(2)CH(2)]SnCl(H(2)O)(C(6)H(5))(3)} was obtained as a crystalline solid and characterized by X-ray crystallography.