CARBON BLACK AS AN ELECTRON-TRANSFER CATALYST - THE TWO-PHASE DEHYDROGENATION OF HYDRAZO NITRILES BY AN AQUEOUS SOLUTION OF POTASSIUM HEXACYANOFERRATE(III), USING CARBON BLACK AS THE CATALYST.

Article abstract of DOI:10.1246/bcsj.55.3541

The two-phase(aqueous and organic phase) dehydrogenation of hydrazo nitriles by an aqueous solution of potassium hexacyanoferrate(III), using carbon black as the catalyst, was carried out at 40 degree C with shaking. In the presence of carbon black, the two-phase dehydrogenation of hydrazo nitriles was accelerated, and the corresponding azo nitriles were obtained in good yields. The catalytic activity of channel blacks was larger than that of furnace blacks. Moreover, the increasing content of phenolic hydroxyl groups tended to increase the catalytic activity of carbon blacks. It became apparent that phenolic hydroxyl groups on the surface of carbon black act as an electron-transfer catalyst in the two-phase dehydrogenation.