[GRAPHICS]The reaction of benzyloxyfluorodiazirine (3) with SbF5 in benzene gives PhCH2OCF, which undergoes SbF5-mediated fragmentation to PhCH2+, CO, and SbF6-; the benzyl cation alkylates benzene to yield diphenylmethane. Phenoxyfluorodiazirine (4) reacts with SbF5 in benzene to give PhOCF and (ultimately) triphenylmethane by a pathway that avoids fragmentation.