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Conformations of GABA analogues. I: Crystal and molecular structure of guanidinoacetic acid

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Abstract

The crystal and molecular structure of guanidinoacetic acid has been determined by single-crystal X-ray diffraction techniques. The crystals are monoclinic, space groupP21/c, witha = 4.942(3),b = 6.010(3),c = 21.911(14) Å, β = 128.60(4) °, andZ = 4. The structure was solved by direct methods, and refined by least-squares procedures toR = 0.070 for 552 observed diffraction maxima. The molecules are zwitterions linked by an infinite three-dimensional network of hydrogen bonds via the primary amine nitrogen and carboxylate oxygen atoms. The secondary amine nitrogen atom is not involved in hydrogen bonding.

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Jones, G.P., Pauling, P.J. Conformations of GABA analogues. I: Crystal and molecular structure of guanidinoacetic acid. Journal of Crystal and Molecular Structure 9, 273–279 (1979). https://doi.org/10.1007/BF01320842

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