Acta Cryst. (2009). E65, o1220  [ doi:10.1107/S1600536809016018 ]

1,2-Diiodo-4,5-dimethylbenzene

B. A. Hathaway, U. J. Kilgore and M. R. Bond

Abstract: The structure of the title compound, C₈H₈I₂, conforms closely to the mm2 symmetry expected for the free molecule and is the first reported structure of a diiododimethylbenzene. Repulsion by neighboring I atoms and the neighboring methyl groups opposite to them results in a slight elongation of the molecule along the approximate twofold rotation axis that bisects the ring between the two I atoms. In the extended structure, the molecules form inversion-related pairs which are organized in approximately hexagonal close-packed layers and the layers then stacked so that molecules in neighboring layers abut head-to-tail in a manner that optimizes dipole-dipole interactions.

Online 7 May 2009

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