Suresh, CG and Vijayan, M (1983) X-ray studies on cyrstalline complexes involving amino acids and peptides. VIII. Head-to-tail arrangement and a specific interaction in the crystal structure of L-arginine acetate. In: International Journal of Peptide & Protein Research, 21 (3). pp. 223-226.Full text not available from this repository. (Request a copy)
L-Arginine acetate crystallizes in the monoclinic space group P2(1) with a = 9.229(2), b = 5.178(3), c = 13.271(4) A and beta = 111.4(1) degrees. The crystal structure was solved by direct methods and refined to an R value of 0.058 for 1333 observed reflections. The conformation of the arginine molecules in the crystal is different from those observed in the crystals of L-arginine, its salts and complexes. The crystal structure indicates that complexation with a small carboxylic acid like acetic acid is sufficient to align arginine molecules in a head-to-tail fashion. The structure contains a specific ion-pair interaction, involving electrostatic attraction as well as two nearly parallel, N-H ... O hydrogen bonds, between the guanidyl group and the acetate ion.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Munksgaard International Publishers.|
|Department/Centre:||Division of Biological Sciences > Molecular Biophysics Unit|
|Date Deposited:||16 Jun 2008|
|Last Modified:||27 Aug 2008 13:28|
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