Journal article

Electrochemical synthesis and structural and physical characterization of one- and two-electron-reduced forms of [SMo12O40](2-)

T Vu, AM Bond, DCR Hockless, B Moubaraki, KS Murray, G Lazarev, AG Wedd

INORGANIC CHEMISTRY | AMER CHEMICAL SOC | Published : 2001

Abstract

Isolation of a soluble [NHex4]+ salt has allowed a detailed electrochemical study of the anion alpha-[SMo12O40]2- to be undertaken. Four reversible one-electron-reduction processes are observed in CH2Cl2 solution. Controlled potential electrolysis led to isolation of tetraalkylammonium salts of the one-electron-reduced anion alpha-[SMo12O40]3- and the two-electron-reduced anion alpha-[SMo12O40].4- [SMo12O40]3- is stable to disproportionation in dry solvents (Kdis = 10(-7.4). EPR and magnetic susceptibility data indicate that [SMo12O40]3- is a simple paramagnet (S = 1/2) while [SMo12O40]4- is paramagnetic with the mu eff values decreasing at low temperatures. Solutions of the two-electron-red..

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