Organotin compounds have a wide range of appli- cations [10], including biological activity as potential antineoplastic and anti-tuberculosis agents [11,12], plas- tic stabilizers [13,14] and polymer catalysts [15]. Recent studies on organotin carboxylates have involved either single crystal structure determination or spectroscopy [16]. We undertook the preparation and characterization of three organotin complexes with benzamidoalanine: triphenyltin(IV)bis(benzamidoalanine) (Ph3 SnL), tributyltin(IV)bis(benzamidoalanine) (Bu3 SnL) and trimethyltin(IV) bis(benzamidoalanine) (Me3 SnL) and determined their antimicrobial activity.