Abstract
An N-heterocycle (tetrazole)-stabilized pseudocyclic λ3-iodane was synthesized and its thermal stability and redox activity were studied. Simultaneous thermogravimetric analysis and differential scanning calorimetry revealed that the polyvalent iodine compound started to degrade at 127 °C and showed a notable exothermic decomposition peak at 147 °C, which was markedly more pronounced than the parent tetrazole with monovalent iodine. The reduction potential was determined by cyclic voltammetry to be −0.38 V vs AgNO3|Ag in dimethyl sulfoxide at a scan rate of 0.02 V/s. The oxidative power of the polyvalent iodine compound was demonstrated by conducting oxidation of thioanisole to sulfoxide and oxidative dimerization of thiobenzamide to 3,5-diphenyl-1,2,4-thiadiazole.
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