DL-arginine monohydrate at 100 K.
In the title compound, C(6)H(14)N(4)O(2).H(2)O, the alpha-amino group is neutral. The molecular side chain including the guanidinium group is not fully extended, having a near gauche-gauche conformation [chi(3) = 59.0(1)degrees; chi(4) = 72.8(1)degrees]. The network of hydrogen bonds stabilizing the crystal lattice includes those formed between the deprotonated and negatively charged alpha-carboxylate groups and the positively charged amino groups of the guanidinium group of neighbouring molecules. N-H...O=C and water-mediated N-H...O hydrogen bonds link individual molecules to produce pairs of spiral motifs laterally connected by N-H...O and C-H...O hydrogen bonds.
Kingsford-Adaboh
R
R
Department of Chemistry, University of Ghana, Accra, Ghana.
Grosche
M
M
Dittrich
B
B
Luger
P
P
D001120:Arginine / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation
D001120:Arginine