STRUCTURE AND VIBRATIONAL-SPECTRA OF AMMONIUM HYDRAZINIUM SULFATE

The crystal structure of ammonium hydrazinium sulfate, (NH4)2N2H6(SO4) 2, is reported for the first time. This compound crystallizes in a uni molecular unit cell in the triclinic space group P1BAR with a = 5.600, b = 5.595, c = 8.608 angstrom, alpha = 72.47, beta = 74.13 and gamma = 66.14-degrees. Hydrogen bonding is noted between the sulfate ion and both the ammonium and hydrazinium ions. The room temperature Raman an d infrared spectra have been measured. Band assignments of internal an d external optic modes are proposed, aided by comparison with spectra of the parent compounds, ammonium sulfate and hydrazinium sulfate. A d ifferential scanning calorimetry measurement indicates phase transitio ns at 56 and 125-degrees-C.