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1 Polish Journal of Chemistry

1 2003

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Crystal Structure and Vibrational Studies of Glycine-LiNO3 and Glycine-NaNO3 Crystals

Baran J., Drozd M., Pietraszko A., Trzebiatowska M., Ratajczak H.

Polish Journal of Chemistry

2003

Vol. 77 / nr 11

1561-1577

New crystal of glycine with lithium nitrate [(NN3 +CH2COO-)LiNO3; GLiN] was discovered. It belongs to the space group P1 of the triclinic system. Its structure is different from that of the glycine-NaNO3 crystal (GNaN). The Li2O6 units can be distinguished in the GLiN crystal. They have a shape of two symmetry related (through a centre of inversion) tetrahedrons with a common edge. Powder IR and FT-Raman spectra of GLiN and its deuterated analogue and of GNaN were measured and discussed with respect to the crystal structures. The splitting of some vibrations is observed, which suggests the breaking of the selection rules for the centre of inversion.