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The structure of ammonium oxalohydroxamate - a monopropellant

Begum, Sameena A and Jain, VK and Ramakumar, S and Khetrapal, CL (1988) The structure of ammonium oxalohydroxamate - a monopropellant. In: Acta Crystallographica Section C, 44 . pp. 1047-1049.

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Abstract

Abstract. NHn+.C2H3NzO4, Mr= 137.1, triclinic, Pi, a=3-952(1), b=6.772(1), c=9.993(1)A, a= 98.06 (1), fl= 89.96 (1), ~= 106.96 (1) °. V=253.06 A 3, z = 2, 2(Cu Ka) = 1.5418 A, g =15.29 cm -~, D m = 1.805, D x = 1.798 g cm -3, F(000)= 144, T= 293 K, R = 0.048 for 795 observed reflections. The unit cell contains two independent centrosymmetric molecules, one centred at (0,0,0) and the other at (0.5, 0.0, 0.5). The presence of experimentally determined~N-H groups and the -C=O bond lengths of 1.248 (4) and 1.247 (4)A indicate that the compound exists in the oxamic rather than the oximic form. Only one hydroxyl hydrogen is associated with each molecule. They are located at centres of inversion (0,0.5,0 and 0,0.5,0.5) and are shared between symmetry-related molecules via short symmetric H bonds with O...O=2.454(4), 2.457(4) and all O-H = 1.23 A

Item Type: Journal Article
Additional Information: Copyright of this article belongs to International Union of Crystallography.
Department/Centre: Division of Chemical Sciences > Sophisticated Instruments Facility
Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 07 Oct 2010 05:24
Last Modified: 07 Oct 2010 05:25
URI: http://eprints.iisc.ernet.in/id/eprint/33051

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