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 serie s of di-and tri-organotin (IV) [LSnRnL '] complexes where n = 2 or 3, L=1-a mino acids like tryptophan, leucine and valine and L ' =1,10-phenanthroline , have been prepared and characterized by conventional methods. Structure e lucidation 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 th e l-amino acid is behaving as a monodentate ligand in all these complexes a nd the complexes are octahedral in shape with a coordination number six aro und the tin atom.