MOLECULAR ADDUCT OF DIMETHYLTIN DICHLORIDE WITH METHYL N-(2-HYDROXYBENZYLIDENE)-ALANINATE (1/2), [SNCL2(C11H13NO3)2(CH3)2]

The structure of the 2:1 complex of methyl N-(2-hydroxybenzylidene)alaninate with dimethyltin dichloride, dichlorobis(2-{[1-(methoxycarbonyl)-ethyl]iminiomethyl)phenolato-O)dimethyltin, has been determined. The coordination of the Sn atom is octahedral, all trans, with bond distances Sn-Cl = 2.599 (1), Sn-0 = 2.244 (3) and Sn-C = 2.111 (4) angstrom. The ligands are coordinated to Sn through the phenolic 0 atoms, the hydroxylic H atoms being shifted to the imine N atoms giving rise to a zwitterion. There is intramolecular hydrogen bonding with N-H...0 = 2.628 (4) angstrom.