DI-ORGANOTIN(IV) AND TRI-ORGANOTIN(IV) COMPLEXES OF N-ACETYLTRIGLYCINE AND N-BENZOYLTRIGLYCINE - SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION

Di- and tri-organotin(IV) derivatives of N-acetyltriglycine and N-benz oyltriglycine (HA) obtained by refluxing equimolar mixtures of the lig and and the organotin(IV) oxide or hydroxide in methanol or acetone, A ccording to the spectroscopic data, triorganotin(IV) derivatives adopt a trigonal-bipyramidal structure in which the planar R(3)Sn(IV) unit is bonded by a monodentate carboxylate group and a donor group, presum ably the amide C=O, The reaction of HA with the appropriate diorganoti n(IV) compounds gave both dicarboxylates R(2)SnA(2), with six-coordina ted tin, and dimeric tetra-organodistannoxanes {[R(2)SnA]O-2}(2), in w hich the tin atoms are essentially five-coordinated.