Acta Cryst. (2002). E58, o747-o749  [ doi:10.1107/S160053680201022X ]

A triclinic polymorph of L-argininium chloride

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

Abstract: The title compound, C₆H₁₅N₄O₂⁺·Cl^-, crystallizes in the triclinic system with two crystallographically independent argininium residues and two chloride ions in the P1 unit cell. In an earlier study, the structure of L-arginine chloride [Mazumdar et al. (1969). Z. Kristallogr. 130, 328-339] was determined in the monoclinic space group P2₁. In our work, the side-chain conformation has an all-trans form in one of the residues, whereas in the other residue, it is in the gauche I-trans-trans-trans form. All the N atoms, carboxylate groups and chloride ions are involved in a hydrogen-bonding network.

Online 14 June 2002

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