The crystal structure of hydrazine

Abstract

The crystal structure of hydrazine is monoclinic U~-P21/m with two N~I 4 molecules in a cell of dimensions a-3.56, b-5.78, c-4.53 A., and/?-109"5 °. The N-N bond lies in the mirror plane with nitrogen atoms at xl-0.037, zl-0-362, and at x~-0.736, z~-0.050. The N-N bond distance is 1.46A., and nearest non-bonded distances are 3.19, 3.25 and 3.30 A. The structure suggests an eclipsed configuration for the hydrazine molecule in the crystal, and does not appear to permit residual entropy to be retained at low temperatures.