L-NITROARGININE MONOHYDROCHLORIDE MONOHYDRATE

Two conformers are present in the asymmetric unit of the title compoun d, C6H14N5O4+.Cl-.H2O, whose conformational differences are characteri zed by rotations about the C-alpha-C-beta and C-delta-N-epsilon bonds. The nitroguanidyl moieties of both conformers are nearly planar; each is involved in an intramolecular hydrogen bond between the N-epsilon atom and an O atom of the nitro group. Molecules are held together by a hydrogen-bond network involving the nitroguanidyl moieties, the prot onated alpha-amino and carboxyl groups, two water molecules and two ch loride ions.