Journal of the Chemical Society. Perkin transactions II p. 668 - 671 (1980)
Update date:2022-08-05
Topics:
Lloyd, Douglas
Vincent, Colin A.
Walton, David J.
The 5,7-diphenyl-2,3-dihydro-1,4-diazepinium cation (II), dissolved in dimethylformamide, is reduced in two steps.The first wave, at -1.23 V with respect to an aqueous Ag-AgCl-KCl (saturated) reference, provides a radical which disproportionates to give the corresponding dihydrodiazepine base (I) and a tetrahydrodiazepine (IV).The second wave is at -2.00 V and produces the anion (IV).The reduction was studied by polarography, cyclic voltammetry, and preparative electrochemistry.The dihydrodiazepine base is electroinactive to -2.1 V, whereat it displays an apparently two-electron reduction wave.
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