Hydrogen Bond Studies. 24. The Crystal Structure of Hydrazinium Hydrogen Oxalate, N2H5HC2O4.

The crystal structure of sodium hydrogen oxydiacetate and potassium hydrogen oxydiacetate

“…The chains are crosslinked by the alkali metal ions. The structure thus closely resembles the structures of the alkali hydrogen salts of oxalic, malonic, succinic, and glutaric acid (Pedersen, 1968;Sime, Speakman & Parthasarathy, 1970;McAdam, Currie & Speakman, 1971;Macdonald & Speakman, 1972), and of hydrazinium hydrogen oxalate (Ahmed, Liminga & Olovsson, 1968).…”

Hydrogen-bond studies. LXXV. An X-ray diffraction study of normal and deuterated hydrazinium hydrogen oxalate, N2H5HC2O4 and N2D5DC2O4

“…This is perhaps not so surprising in the case of the X-ray study (Ahmed et al, 1968) which employed film data. On the other hand, some indication might have been expected from the neutron diffraction study (Nilsson et al, 1968).…”

“…Clear rod-shaped crystals of HYHOX were obtained as described by Ahmed et al (1968). The DYDOX crystals were obtained by repeated recrystallizations from heavy water (> 99.9 %).…”

“…A series of refinements was performed for both space groups. In P2~/m the heavy-atom positional parameters of Ahmed et al (1968) This is intended to take account of the proportionately larger effects of random errors on the intensities of stronger reflexions. The suitability of such a weighting scheme was checked after the final refinements.…”

“…An X-ray diffraction structure determination by Ahmed, Liminga & Olovsson (1968) followed by a neutron diffraction study by Nilsson, Liminga & Olovsson (1968) established the existence of N2H~-and HC204 ions in the room-temperature crystal structure. A proton magnetic resonance investigation by Tegenfeldt & Olovsson (1971) has further shown that the NH3 end of the N2H~ ion reorients rapidly about the N-N bond.…”