Reactivity of 17-, 18-, and 19-Electron Tungsten Complexes

The oxidative current (peak A) corresponds to a two-electron process at scan rates up to at least lOV/s at 228 K. 

Both the observed waves are irreversible at scan rates up to I0,000V/s. 

When the switching potential is 1.1 V, the B/A peak current ratio is constant and equal to 0.5. 

The B/A current ratio increases as the switching potential is made more positive. 

Simulation analysis showed that a mechanism consistent with all these observations is one in which the initial one-electron oxidation of W is followed by a fast addition of solvent (S), a 19-electron adduct, which is further oxidized. 

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