Hydrogen-1 nuclear magnetic resonance evidence for exchange reactions in the antimony(III)–cysteine system and synthesis of antimony(III) compounds of 3,3-dimethylcysteine, toluene-3,4-dithiolate, dicyano-ethylene-1,2-dithiolate, and 2,3-bis(thiosemicarbazono)butane

Abstract

Exchange reactions in antimony(III)–cysteine and –3,3-dimethyl-D-cysteine (dmc) systems have been investigated. Exchange is rapid and independent of pH with antimony(III)–cysteine systems at pH 1–3 but is slow with potassium bis(tartrato)diantimonate(III)–cysteine. Antimony(III) compounds of dmc, toluene-3,4-dithiolate, Dicyano-ethylene-1,2-dithiolate, and 2,3-Bis(thiosemicarbazono)butane have been synthesized and characterized.