The infrared spectrum of hydrazinium(1+) fluoride

Abstract The i.r. spectra of solid hydrazinium( 1 +) fluoride and of its completely deuterated analogue have been examined over the region from 4000 to 250 cm −1 . The spectral features confirm the existence of N 2 H 5 + and N 2 D 5 + ions in these compounds. The lower frequency of the NH stretching modes as well as the higher frequency of deformation and bending modes in this compound compared with the corresponding chloride salt, are ascribed to stronger hydrogen bonding from nitrogen to fluorine. Assignments of the fundamental frequencies are discussed.