Synthesis of novel penta and hexa coordinated monobutyltin(IV) derivatives based on oximes and N-protected amino acids

Several new monobutyltin(IV) derivatives containing both oximes and N-protected amino acids have been generated. The compounds having the general formulae BuSn[(L) A], where LH=cyclohexanoneoxime, acetophenoneoxime and (where R=-CH(CH , -CH(CH )CH CH , -CH ), and BuSn[L(A) ], where LH=cyclohexanoneoxime, acetophenoneoxime and (where R=-CH(CH , -CH(CH )CH CH , -CH ), were generated by the reactions of monobutyltin(IV) trichloride with sodium salts of oximes and N-protected amino acids in 1:2:1 and 1:1:2 molar ratios in dry boiling benzene. Plausible structures of these compounds were suggested based on physico-chemical and spectroscopic studies. Sn NMR spectroscopic data revealed the presence of five and six coordinated tin centers.