Acta Cryst. (2001). E57, o999-o1000  [ doi:10.1107/S160053680101532X ]

The twinned crystal structure of 3-indolylacetic acid

A. Degen and M. Bolte

Abstract: Crystals of the title compound, C₁₀H₉NO₂, whose structure has already been determined four times by different research groups, were found to be twinned. Satisfactory refinement is only possible if the twinning is taken into account. This kind of twinning in the monoclinic crystal system can, in principle, occur if the following condition is met: a·|cos| = c/2, i.e. if the short diagonal of the ac plane is of the same length as a or c itself.

Online 6 October 2001

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