Reactions of Difluorovinylidene—A Super-Electrophilic Carbene
摘要:
Difluorovinylidene is the only vinylidene that could be isolated in low temperature matrices, so far, Its unusual reactivity is governed by its extreme electrophilicity and electron affinity, Thus, it not only adds CO and N without difficulties, but also inserts into CH4 and even H-2 at temperatures below 40 K. The reaction of F2C=C: with FC=CF clearly reveals that the formation of methylenecyclopropene proceeds in a stepwise reaction, The most striking example for the electrophilicity of F2C=C: is the thermal reaction with Xe to give a charge-transfer complex with a characteristic IR spectrum.