Synthesis and Characterization of bis[β-Carboalkoxyethyl]tin(IV) Schiff Base Complexes

Abstract

Several complexes of the type R₂SnL {wher R = -CH₂CH₂CO₂CH₃, -CH₂CH₂CO₂C₂H₅ or -CH₂CH₂CO₂C4H₉; and L = S-nethyl-β -N-(2-hydroxyphenyl)methylenedithiocarbazate [H₂SMSaD], S-methyl-β -N-(2-hydroxy-3-methoxyphennyl)methylenedithiocarbazate [H₂SMSVD], or S-mithyl- β -N-(2-hydroxy-1-naphthyl)nethy lenedithiocarbazate [H₂SHND]} have been sythesized for the first time and characterized by their elemental analyses, nolecular weight determination, IR, ¹H, ¹³C and ¹¹⁹Sn nmr spectra. The values of ¹J (¹¹⁹Sn, ¹³C) were used for the calculation of C-Sn-C angles (θ) which were found to be 140–143°. The spectral data are consistent with an octahedral geometry around tin(IV) in which the Schiff base acts as a dianionic tridentate ligand and the ester groupings are present as nonodentate as well as bidentate moieties.