Abstract
Abstract The novel dimethyltin complex with formula Me 2 Sn(2-OC 6 H 4 CHNC 6 H 4 COO), compound 1 , involving the Schiff base derived from anthranilic acid and salicylaldehyde, has been synthesized and characterized by elemental analysis, IR, 1 H-, 13 C- and 117 Sn-NMR, 119 Sn Mossbauer spectroscopy and single-crystal X-ray diffraction structure analysis. The crystals of complex 1 are monoclinic, space group P 2 1 / n , a =8.907(5), b =12.044(7), c =14.062(9) A, β =104.99(5)°, Z =4, R 1 =0.0296, wR 2 =0.08 for 1368 observed reflections. The crystal structure of 1 features centrosymmetric dimers disposed about a central Sn 2 O 2 core. The tin environment is seven-coordinate if a moderately long contact distance Sn(1)O(2a) (2.69(1) A) and a longer one Sn(1)O(3a) (3.03(1) A) are included in the coordination list. In the basic monomeric structural unit, the tin configuration can be seen as a distorted square-pyramid with the imine nitrogen atom in apical position, the N -(2-carboxyphenyl)salicylideneimine dianion coordinating a single tin atom via the phenolate oxygen atom, the imine nitrogen atom and one of the carboxylate oxygen atoms. The distortion of the square pyramid is discussed in terms of a trend to trigonal-bipyramidal geometry.
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