The present paper describes the syntheses, characterization of some new coo
rdination compounds of organotin(IV) with Schiff bases derived by condensat
ion of heterocyclic ketones and amino acids, viz, glycine, beta-alanine, al
pha-valine, alpha-isoleucine and alpha-tryptophan, The newely prepared comp
ounds have been characterized by elemental analysis, conductance measuremen
ts, molecular weight determinations, infrared and nuclear magnatic resonanc
e (H-1, C-13 and Sn-119 NMR) spectral studies. An trigonal bipyramidal geom
etry has been proposed for all of the complexes. A few representative ligan
ds and their tin complexes have also been screened for their antibacterial
activities and found to be quite active in this respect.