Coordination Chemistry and Spectroscopic Properties of Some Diorganotin(IV) Complexes with S-Donor Schiff Base Ligands |
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Authors: | Tahereh Sedaghat Ali Zamani |
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Institution: | Department of Chemistry, College of Sciences , Shahid Chamran University , Ahvaz , Iran |
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Abstract: | Abstract Schiff bases S-benzyl- and S-methyl-β-N-(2-hydroxyphenyl)methylene dithiocarbazate (H2L1 and H2L2, respectively) and S-benzyl- and S-methyl-β-N-(2-chlorophenyl)methylenedithiocarbazate (HL3 and HL4, respectively) were prepared. Then organotin(IV) complexes SnPh2(L1)] (1), SnMe2(L1)] (2), SnPh2(L2)] (3), SnMe2(L2)] (4), SnPh2Cl(L3)] (5), and SnPh2Cl(L4)] (6) were obtained from the reaction of Schiff bases with SnR2Cl2 (R = Ph and Me). The synthesized complexes have been investigated by elemental analysis and IR, 1H NMR, and 119Sn NMR spectroscopy. Spectroscopic studies show that, in complexes 1–4, the Schiff base acts as a tridentate dianionic ligand and coordinates through the thiol group, imine nitrogen, and phenolic oxygen. The coordination number of tin is five. In complexes 5 and 6, the ligand is monoanionic and unidentate, and coordinated only via the thiol group, and the azomethine nitrogen is not involved in coordination to tin. Therefore the coordination number of tin is four. GRAPHICAL ABSTRACT |
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Keywords: | Organotin Schiff base 119Sn NMR thiolate ligands tin |
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