C. Dahm, D. Peters
Oct 1, 1994
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Journal
Analytical Chemistry
Abstract
In acetonitrile containing tetramethylammonium tetrafluoroborate, nickel(II) salen undergoes antic polymerization onto a carbon electrode. Nickel(II) in the polymer film exhibits reversible one-electron reduction to form nickel(I), which can catalytically reduce iodoethane or 2-iodopropane to form an ethyl or 2-propyl radical respectively, and to regenerate nickel(II). Kinetics studies with the aid of hydrodynamic voltammetry indicate that the catalytic reduction of iodoethane belongs to the EB regime of Saveant and co-workers, whereas catalytic reduction of 2-iodopropane is of the S classification. Controlled-potential electrolyses of iodoethane and 2-iodopropane at nickel-(II) salen-coated reticulated vitreous carbon cathodes give product distributions in accord with the relative importance of radical coupling and disproportionation