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A three dimensional X-ray study of crystalline valerie acid has shown it to be monoclinic with a=5.55, b=9.664, c=11.341 A; fl=101 49',; Z=4, and space group c~h-p2~/c. The trial structure was obtained from a Patterson function of the a axis projection. The structure was refined by least-squares methods. The final structure consists of dimers located about a center of symmetry with a hydrogen bond distance of 2.63 A. The observed interatomic distances are C-()= 1.35, 1.26 A; C-C = 1.53, 1-53, 1.57, 1.57 A. All intermolecular contact distances are normal.
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Scheuerman et al. (1962) studied this question.
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