Abstract
The crystal and molecular structure of monoglycine nitrate (C2 H6 NO+ 2, NO− 3) has been determined by single-crystal X-ray diffraction methods. The crystals are orthorhombic: space groupP212121,a = 16.42(6),b = 6.10(4),c = 5.61(5) A andZ = 4. The structure has been solved by direct phase determination methods, using visually-estimated intensity data, and was refined to anR -value of 0.064, using counter-measured intensity data for 660 reflections. The anomalous scattering by oxygen and nitrogen atoms suggests the present configuration. The molecule in the structure exists as+NH3CH2CO2H, NO− 3. The glycinium molecule is planar, except for the N(amino) atom, which deviates by 0.48 A from the molecular plane defined by the atoms C(1), C(2), O(1) and O(2). The torsion angle N(1), C(2), C(1), O(1) is 20.7 °. The NH3 group is a donor of three hydrogen bonds of equal strength (N ... 0 = 2.85 A). Two of the hydrogen atoms of the NH3 group also form weak bifurcated hydrogen bonds (N ... 0 = 3.04 A). One of the carboxyloxygen atoms is a donor of a hydrogen bond (0 ... 0 = 2.65 A). The oxygen atom of the carboxyl group and the oxygen atoms of the nitrate group are all acceptors of hydrogen bonds.
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