Acta Crystallographica Section E (Aug 2008)

A polymorph of terephthalaldehyde

  • Lei Teng,
  • Zhiguo Wang

DOI
https://doi.org/10.1107/S1600536808022381
Journal volume & issue
Vol. 64, no. 8
pp. o1562 – o1562

Abstract

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A new orthorhombic polymorph of terephthalaldehyde, C8H6O2, with a melting point of 372 K, has been obtained by recrystallization from ethanol. At room temperature, the crystals transform into the well known monoclinic form, with a melting point of 389 K. The crystal structure of the monoclinic form involves C—H...O hydrogen bonds, but no such bonds are observed in the orthorhombic form. The molecule is planar.