“…The effect of F was noted in studies with --0« 4 02 and p-RX-CeH4NC>2, where R is a fluorinated alkyl group and X is a heteroatom (740) with nitroaromatic compounds containing difluoromethylene groups (739). Mechanistic studies were reported for p-dinitrobenzene in which azoxy derivatives were identified as intermediates (340), for 2-nitroand 2,2'-dinitro-biphenyl (774), and for the six-electron reduction of 5-nitrofurylidenhydrazones (862).…”