1. Pentafluoroguanidine reacts easily with electrophilic reagents: chlorine fluorosulfate, peroxydisulfuryl fluoride, and nitryl chloride. 2. In bis(difluoroamino)fluorochloroaminomethyl and bis(difluoroamino)fluorosulfatemethyl fluorosulfates the difluoroamino groups are easily replaced by fluorosulfate groups uncer the influence of either chlorine fluorosulfate or peroxydisulfuryl fluoride.