Synthesis and characterization of novel chiral organotin complexes

Abstract

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) [LSnR_nL'] 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, ¹H, ¹³C, ¹¹⁹Sn 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 !-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.