Synthesis and characterization of novel chiral organotin complexes

Novel chiral complexes of organotin have been synthesized using amino acids as chiral auxiliary and 1,10-phenanthroline as a secondary ligand. A series of di-and tri-organotin (IV) [LSnRnL '] complexes where n = 2 or 3, L=1-amino acids like tryptophan, leucine and valine and L ' =1,10-phenanthroline, have been prepared and characterized by conventional methods. Structure elucidation has been done by IR, UV, H-1, C-13, Sn-119 NMR spectroscopy. All the complexes are air stable and non-electrolytic in nature. On the basis of spectral evidences, it has been concluded that the carboxylic acid of the l-amino acid is behaving as a monodentate ligand in all these complexes and the complexes are octahedral in shape with a coordination number six around the tin atom.