Crystal structure of 3,6-dihydroxy-4,5-dimethylbenzene-1,2-dicarbaldehyde.

The title compound, C10H10O4, was synthesized from tetramethyl-1,4-benzoquinone. In the crystal, the almost planar molecule (r.m.s. deviation = 0.024 Å ) forms intramolecular hydrogen bonds between the aldehyde and hydroxy groups and exhibits C2v symmetry. This achiral molecule crystallizes in the chiral space group P21 with intermolecular O--H• • •O and C--H• • •O hydrogen bonding and C--H• • •π and C=O• • •π interactions stabilizing the crystal packing. [ABSTRACT FROM AUTHOR]