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Abstract <p>The thermal behavior of L-tyrosine is studied by single crystal X-ray diffraction in temperature range from 293&#xa0;K to 100&#xa0;K. The thermal expansion is highly anisotropic, expressing almost exclusively along the <i>b</i> axis. This behavior is directly correlated with the intermolecular interactions network: strong N–H⋯O hydrogen bonds rigidify the structure along the <i>a</i> and <i>c</i> directions, while weaker aromatic C–H⋯π interactions along <i>b</i> axis, are responsible for its high thermal expansion. The macroscopic anisotropy is thus a direct manifestation of the underlying anisotropic potential of intermolecular interactions.</p>

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Crystal Structure of L-Tyrosine on Cooling: the Relationships Between Anisotropy of Lattice Strain and Intermolecular Interactions

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • S. S. Sharaya,
  • N. E. Bogdanov,
  • B. A. Zakharov

摘要

Abstract

The thermal behavior of L-tyrosine is studied by single crystal X-ray diffraction in temperature range from 293 K to 100 K. The thermal expansion is highly anisotropic, expressing almost exclusively along the b axis. This behavior is directly correlated with the intermolecular interactions network: strong N–H⋯O hydrogen bonds rigidify the structure along the a and c directions, while weaker aromatic C–H⋯π interactions along b axis, are responsible for its high thermal expansion. The macroscopic anisotropy is thus a direct manifestation of the underlying anisotropic potential of intermolecular interactions.