10-Benzoyl-phenanthrene-8,9-dicarboxylic anhydride.

ABSTRACT: The asymmetric unit of the title compound, C(23)H(12)O(4), contains two nearly parallel independent mol-ecules; the dihedral angles between the phenanthrene ring systems of the two mol-ecules and between the benzene rings of the two mol-ecules are 4.97?(9) and 8.1?(2)°, respectively. In each mol-ecule, the benzene ring is nearly perpendicular to the phenanthrene ring system, with dihedral angles of 86.42?(19) and 86.68?(18)°. ?-? stacking exists between the phenanthrene ring systems of the two independent mol-ecules [centroid-centroid distance = 3.698?(2)?Å]. Short intermolec-ular contacts [O?O = 2.86?(2) and C?O = 2.88?(2)?Å] are also present in the crystal structure.

SUBMITTER: Yu HT 

PROVIDER: S-EPMC2980053 | biostudies-literature | 2009 Dec

REPOSITORIES: biostudies-literature