Crystal structure of (E)-3-(5-bromo-2-hydroxyphenyl)acrylaldehyde

Abstract

The title compound, C9H7BrO2, displays a trans configuration with respect to the C=C double bond and is essentially planar [maximum deviation from the least-squares plane through all non-H atoms = 0.056 (4) Å]. The vinylaldehyde group adopts an extended conformation wih a C—C—C—C torsion angle of 179.7 (4)°. In the crystal, molecules are linked by classical O—H...O and weak C—H...O hydrogen bonds into a three-dimensional supramolecular network