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Journal of Chinese Pharmaceutical Sciences ›› 2018, Vol. 27 ›› Issue (9): 644-648.DOI: 10.5246/jcps.2018.09.067

• Short communication • Previous Articles     Next Articles

Crystal structure of trans-3-phenyl-2-propenoic acid

Yucui Ma, Liang Xu, Cui Wu, Zhimao Chao*   

  1. Institute of Chinese Materia Medica, China Academy of Chinese Medicine sciences, Beijing 100700, China
  • Received:2018-03-21 Revised:2018-04-15 Online:2018-09-29 Published:2018-08-20
  • Contact: Tel.: +86-13522705161, Fax: +86-010-64013996, E-mail: chaozhimao@icmm.ac.cn
  • Supported by:

    The China Agriculture Research System (Grant No. CARS-21) and the public welfare research special project in General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China (Grant No. 201210209).

Abstract:

The title compound of trans-3-phenyl-2-propenoic acid (C9H8O2), a main active organic acid of cinnamon bark and styrax, was obtained by oxidization from trans-3-phenyl-2-propenaldehyde and characterized by X-ray diffraction analysis. It crystallizes in monoclinic system, space group P21/n with a = 5.55916(10), b = 17.4870(3), c = 7.70677(13) Å, V = 744.89(2) Å3, Z = 4, Dc = 1.321 g/cm3, Mr= 148.15, F(000) = 312, and μ = 0.764 mm1. A total of 2661 reflections with 1447 unique ones (Rint = 0.0137) were collected, in which 1447 were observed (I>2σ(I)).There were two C9H8O2 molecules in an asymmetric unit. The structural unit was a dimer formed by the hydrogen bonding of the oxygen atom of carbonyl group and the hydrogen atom of hydroxyl group. A 3D layer structure was formed through hydrogen bonds andVan der Walls’ forces.

Key words: trans-3-Phenyl-2-propenoic acid, Crystal structure, Organic acid, Layer structure

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