REACTION OF HYDRAZINIUM AZIDE WITH SULFURIC-ACID - THE X-RAY STRUCTURE OF [N2H6][SO4]

Stoichiometric reaction of [N2H5][N-3] with 1 equiv. of H2SO4 in water led to the quantitative formation of pure hydrazinium(+2) sulfate and hydrazoic acid. The reaction was followed by means of N-14 NMR spectr oscopy and the N-14 NMR spectra of [N2H5][N-3] and HN3 are reported. T he structure of [N2H6][SO4] was determined at -100 degrees C. The sulp hate anion has the configuration of an almost regular tetrahedron, whi le the hydrazinium cation may be considered to be of the trans type. T here are no hydrogen bonds between the oxygen atoms, however, very-sho rt O ... N distances in the range between 2.7 and 2.9 Angstrom can be interpreted as strong hydrogen bonds between the cations and the anion s. Copyright (C) 1996 Elsevier Science Ltd