Acta Cryst. (2002). E58, o272-o276  [ doi:10.1107/S1600536802002234 ]

Bis(L-glutamic acid) sulfate hemihydrate

B. Sridhar, N. Srinivasan and R. K. Rajaram

Abstract: The unit cell of the crystal structure of the title compound, 2C₅H₁₀NO₄·SO₄·0.5H₂O, contains eight crystallographically independent glutamic acid residues protonated at the N atom, four sulfate anions and two water molecules. The glutamic acid residues are in different conformations. Both the - and -carboxyl groups are involved in strong O-HO hydrogen bonding; at the same time each residue shows a different hydrogen-bonding scheme. Owing to the differences in conformational features and hydrogen-bonding patterns of each residue, there is no pseudosymmetry or higher symmetry in the structure.

Online 22 February 2002

Copyright © International Union of Crystallography
IUCr Webmaster