One-electron cyclic voltammetric reduction potentials of some molybdo-oxaziridines

Abstract

The electrochemistry of [MoO(S₂CNEt₂)₂(ONC₆H₄X-p)](X = CH₃, H, or Cl) has been examined voltammetrically. A one-electron cyclic voltammetric reduction peak (E_pc) observed near –1.2 V (versus a saturated calomel electrode) is assigned to the process Mo^VI→ Mo^V. The Mo^V species is too unstable for electrochemical detection. The E_pc values correlate linearly with Hammett parameters of the substituent X. The reduction peak of [MoO₂(S₂CNEt₂)₂] occurs at –1.03 V. The oxaziridine group is found to be a better donor than the oxo-group.