Crystal structure of 2,3-dimethylmaleic anhydride: continuous chains of electrostatic attraction
In the crystal structure of 2,3-dimethylmaleic anhydride, C6H6O3, the closest non-bonding intermolecular distances, between the carbonyl C and O atoms of neighboring molecules, were measured as 2.9054 (11) and 3.0509 (11) Å, which are well below the sum of the van der Waals radii for these atoms. These close contacts, as well as packing motifs similar to that of the title compound, were also found in the crystal structure of maleic anhydride itself and other 2,3-disubstituted maleic anhydrides. Computational modeling suggests that this close contact is caused by strong electrostatic interactions between the carbonyl C and O atoms.
Wiscons, Ren A., Matthias Zeller, and Jesse L.C. Rowsell. 2015. "Crystal structure of 2,3-dimethylmaleic anhydride: continuous chains of electrostatic attraction." Acta Crystallographica Section E Crystallographic Communications 71(8): 950-955.
International Union of Crystallography
Acta Crystallographica Section E: Crystallographic Communications
Chemistry and Biochemistry
Crystal structure, Maleic anhydride, Carbonyl-carbonyl interactions