ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Coumarin 153, 2,3,6,7-tetrahydro-9-(trifluoromethyl)-1H,5H,11H-[1] benzopyrano[6,7,8-ij]quinolizin-11-one, C16H14F3NO2, was found to exist in a new polymorphic form in the triclinic system. There is an earlier report of a crystal structure determination of this compound, also in the triclinic system, but with a different cell volume and packing mode [Gridunova et al. (1992). Kristallografiya, 37, 366–372]. There are three molecules in the asymmetric unit of the title polymorph compared with two in the latter case; all three molecules show disorder in the piperidine ring system. The molecules are planar and are stacked parallel to the (011) plane. The crystal structure is stabilized by C—H...O hydrogen bonds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270195011668
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