ESR parameters and transformations of the products of reduction of methanofullerenes

Paramagnetic products of chemical (by diazabicycloene derivatives) and electrochemical reduction of the dicarbethoxy derivative and phosphorylated methane [60] fullerenes were studied by ESR. In all cases, one-electron reduction affords radical anions (g = 1.9998-1.9999, DeltaH = 0.20-0.28 mT), and further reduction produces the secondary radicals (g = 2.0004-2.00 10, DeltaH = 0.020-0.028 mT). The rate constants for formation and decay of the radical anions in chemical reduction depend slightly on the nature of the reducing agent and substituents in the methanofullerenes. The retro-Bingel reaction occurs during two-electron reduction.