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Six new heteroleptic phenylantimony(III) derivatives containing substituted oximes and dithiocarbamate moieties of the type (where R = ─C 6 H 5 , X = ─CH 3 (2a); R = ─C 6 H 4 CH 3 , X = ─CH 3 (2b); R = ─C 6 H 4 Cl, X = ─CH 3 (2c); R = ─C 6 H 4 Br, X = ─CH 3 (2d); R = ─C 6 H 4 OH, X = ─H (2e); R(X)C = (2f)) have been synthesized by the reactions of phenylantimony(III) dichloride with the sodium salt of substituted oximes and dithiocarbamate moiety in unimolar ratio with stirring in dichloromethane. All these newly synthesized derivatives have been characterized using physicochemical and elemental analyses. Structures have been proposed on the basis of infrared, 1 H NMR, 13 C NMR and LC-MS spectral studies and molecular modelling. In these derivatives the oxime behaves in an unidentate manner whereas dithiocarbamate behaves in a monofunctional anisobidentate manner. Pseudo-trigonal bipyramidal (ψ-TBP) geometry around the antimony metal centre is proposed for these phenylantimony(III) heteroleptic derivatives. The geometry of a representative complex has been optimized through molecular modelling. These newly synthesized derivatives were screened against Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) bacteria to evaluate their antibacterial potential. The structureactivity relationship for antibacterial activity among the four derivatives 2a, 2c, 2e and 2f is discussed.

The reactions oi tributyltin ethoxide, Bu3SnOEt, with N,N‐dialkylalkanolamines, HORNR2 (where R = CH2 · CH2, CH2 · CH2 · CH2 and CH2 · MeCH; R = CH3 and C2H5) give Bu3SnORNR2. In reactions of Bu3SnOEt with N‐methylethanolamine, HOCH2 · CH2NHMe, and various alkanolamines, HO · R · NH2, (where R = CH2 · CH2 CH2 · CH2 · CH2, CHMe · CH2 CH2 · Me2C and CH2 · CH · CH2 · Me) both the hydroxy as well as the amino groups show reactivity to form products of the type: Bu3SnOCH2 · CH2NHMe, Bu3SnOCH2 · CH2NMeSnBu3, Bu3SnO · R · NH2, Bu3SnO · R · NHSnBu3, and Bu3SnO · R · N(SnBu3)2, respectively. The reaction between Bu3SnOEt and o‐aminophenol yields only Bu3SnO · C6H4NH2.

Das Butylzinntriisopropylat (I) reagiert mit den Aminoalkoholen (II) zu den cyclischen Verbindungen (III)‐(V), während mit Di‐ und Triäthanolamin die Verbindungen (VII) und (VIII) und das Butylstannatran (X) erhalten werden.