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2-Chloro-8,8-dimethyl-8,9-dihydro-7H-chromeno[2,3-b]quinoline-10,12-dione


, : 2-Chloro-8,8-dimethyl-8,9-dihydro-7H-chromeno[2,3-b]quinoline-10,12-dione. Acta Crystallographica. Section E, Structure Reports Online 69(Pt 2): O253-O253

The asymmetric unit of the title compound, C(18)H(14)ClNO(3), contains two independent mol-ecules (A and B). In both mol-ecules, the cyclo-hexa-none ring has a chair conformation. The dihedral angles between the pyran ring and the pyridine and chloro-phenyl rings are 2.13 (9) and 2.19 (9)°, respectively, in A, and 0.82 (9) and 1.93 (9)°, respectively, in B. The carbonyl O atoms deviate from the pyran and benzene rings to which they are attached by -0.092 (2) and 0.064 (2) Å, respectively, in A, and by -0.080 (2) and -0.063 (2) Å, respectively, in B. In the crystal, the A mol-ecules are linked via C-H⋯O hydrogen bonds, forming double-stranded chains along [100]. They lie parallel to the double-stranded chains formed by the B mol-ecules, which are also linked via C-H⋯O hydrogen bonds. The chains stack up the c axis in an -A-A-B-B-A-A- manner, with a number of π-π inter-actions involving A and B mol-ecules; the centroid-centroid distances vary from 3.4862 (11) to 3.6848 (11) Å

US$19.90

PMID: 23424531

DOI: 10.1107/S1600536813001062


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Seo, J.; Choi, J.Young., 2017: Social defeat as a mediator of the relationship between childhood trauma and paranoid ideation. Social defeat, the subjective experience of viewing oneself as a failure or social outsider, is associated with various psychiatric disorders. Recent studies suggest that social defeat may play an important role in the development of psychotic dis...

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Benda, J.; Balcarová, A.; Růzicková, A., 1980: Liver rheogram in healthy subjects. Rheography, an examination method of hepatic hemodynamics, offers the opportunity to diagnose, by evaluating changes in the shape and course of the hepatic rheographic curve, chronic hepatic disorders. It is a non-aggressive method which is sensit...

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