SYNTHESIS AND CHARACTERIZATION OF DI-N-BUTYLBIS(2,4-DIHYDROXYBENZOATO)TIN(IV)

The compound di-n-butylbis(2,4-dihydroxybenzoato)tin(IV), (C4H9)(2)Sn[ 2,4-(OH)(2)C6H3COO](2) has been synthesized and characterized by eleme ntal analysis, IR and NMR (H-1, C-13 and Sn-119) spectroscopy and X-ra y diffraction techniques. The compound is monomeric with the Sn atom e xisting in a skew-trapezoidal bipyramidal geometry, in which the asymm etrically chelating carboxylate ligands comprise the trapezoidal plane and the butyl groups occupy the axial positions with the C-Sn-C angle 139.0(3)degrees. Both of the oxygen atoms from the hydroxy groups res iding on the ligand do not participate in bonding to the tin atom. How ever, in the crystal lattice, there are intermolecular hydrogen bonds of OH...O' type which bond the related molecules together. (C) 1997 El sevier Science Ltd.