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Crystal structure of 1,4-dieth-oxy-9,10-anthra-quinone.


ABSTRACT: The asymmetric unit of the title compound, C18H16O4, contains two crystallographically independent mol-ecules. The anthra-quinone ring systems are slightly bent with dihedral angles of 2.33?(8) and 13.31?(9)° between the two terminal benzene rings. In the crystal, the two independent mol-ecules adopt slipped-parallel ?-overlap with an average inter-planar distance of 3.45?Å, forming a dimer; the centroid-centroid distances of the ?-? inter-actions are 3.6659?(15)-3.8987?(15)?Å. The mol-ecules are also linked by C-H?O inter-actions, forming a tape structure along the a-axis direction. The crystal packing is characterized by a dimer-herringbone pattern.

SUBMITTER: Kitamura C 

PROVIDER: S-EPMC4518951 | BioStudies | 2015-01-01T00:00:00Z

REPOSITORIES: biostudies

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