ISSN:
1600-5368
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
On slow evaporation of an ethyl acetate solution, the title compound, C22H24N2O3, crystallizes simultaneously in two crystalline forms, differing in colour, size and shape. The molecule in the violet plate-like monoclinic crystal reported here is almost planar with the exception of the dimethylcyclohexene moiety, which has a twisted conformation. The red triclinic crystals [see Kolev et al. (2001a), Acta Cryst. E57, o966–o967] are built of the same molecules with similar geometry; however, the cyclohexene fragment in the triclinic crystal has a more symmetric sofa conformation. Another difference between the structures is the existence of a non-classical hydrogen bond involving one of the nitrile groups in the triclinic form. The molecules in the monoclinic form are held together by van der Waals interactions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S1600536801015203
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