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Conformational phase transition of deuterated p-bromobenzyl alcohol as studied by neutron powder diffraction

  • M. Mizuno (a1), M. Hamada (a1), M. Hashimoto (a2), M. Harada (a2), K. Eda (a2), K. Yamamura (a2), T. Kamiyama (a3) and K. Oikawa (a3)...
Abstract

A neutron powder diffraction study on the crystal structure of the title compound (p-Br–C6D4–CD2–OD) confirmed that a first-order phase transition at Tt1=229 K accompanied a drastic change in the molecular conformation caused by a discontinuous rotational shift of the hydroxyl hydrogen atom around the C(D2)–O(D) bond. At T<Tt1, a contraction of the unit cell volume of ∼1% was found when compared to that of the normal compound (p-Br–C6H4–CH2–OH).

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a)Author to whom correspondence should be addressed; Electronic mail: mizuno@wriron1.s.kanazawa-u.ac.jp
References
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Hashimoto M., Harada M., Mizuno M., Hamada M., Ida T., and Suhara M., (2002). “Phase transitions, hydrogen bond and crystal dynamics of p-methylbenzyl alcohol as studied by single crystal X-ray diffraction and 2H NMR,” Z. Naturforsch., A: Phys. Sci. ZNASEI 57, 388394. zna, ZNASEI
Hashimoto M., Monobe Y., Terao H., Niki H., and Mano M., (1998). “Phase transition and crystal dynamics of 4-bromobenzyl alcohol,” Z. Naturforsch., A: Phys. Sci. ZNASEI 53, 436441. zna, ZNASEI
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Powder Diffraction
  • ISSN: 0885-7156
  • EISSN: 1945-7413
  • URL: /core/journals/powder-diffraction
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