title: 9,10-Diphenyl-9,10-epidioxyanthracene and 9,10-dihydro-10,10-dimethoxy-9-phenylanthracen-9-ol.
abstract: 9,10-Diphenyl-9,10-epidioxyanthracene, C(26)H(18)O(2), (I), was accidentally used in a photooxygenation reaction that produced 9,10-dihydro-10,10-dimethoxy-9-phenylanthracen-9-ol, C(22)H(20)O(3), (II). In both compounds, the phenyl rings are approximately orthogonal to the anthracene moiety. The conformation of the anthracene moiety differs as a result of substitution. Intramolecular C-H.O interactions in (I) form two approximately planar S(5) rings in each of the two crystallographically independent molecules. The packing of (I) and (II) consists of molecular dimers stabilized by C-H.O interactions and of molecular chains stabilized by O-H.O interactions, respectively.
authors.affiliation: X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Anwar
authors.initials: A
authors.lastname: Usman
authors.forename: Hoong Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Jian Hua
authors.initials: JH
authors.lastname: Xu