title: 3-Methyl-benzo[1,2-c:5,4-c']dichromen-6(8H)-one.
abstract: The title compound, C21H14O3, crystallizes with eight independent mol-ecules (A-H) in the asymmetric unit which are arranged in four groups of two mol-ecules each (AB, CD, EF and GH). In each mol-ecule, the pyran-2-one ring is planar (r.m.s. deviations vary from 0.001 to 0.017 Å), while the pyran ring has a screw-boat conformation. In the crystal, mol-ecules stack in two columns, along the [10-1] direction, composed of mol-ecules C, B, E and G, and D, A, F and H. Mol-ecules A and F are linked via C-H⋯O hydrogen bonds. In addition, there are a number of C-H⋯π contacts present involving all of the mol-ecules. These inter-actions result in the formation of a three-dimensional network.
authors.affiliation: Department of Physics, Kunthavai Naachiar Government Arts College (W) (Autonomous), Thanjavur 613 007, Tamilnadu, India.
authors.forename: M
authors.initials: M
authors.lastname: Kayalvizhi
authors.affiliation: Department of Physics, Kunthavai Naachiar Government Arts College (W) (Autonomous), Thanjavur 613 007, Tamilnadu, India.
authors.forename: G
authors.initials: G
authors.lastname: Vasuki
authors.affiliation: Department of Chemistry, Institute of Chemical Technology, N.M. Parekh Road, Matunga, Mumbai 400 019, Tamilnadu, India.
authors.forename: Adil I
authors.initials: AI
authors.lastname: Khatri
authors.affiliation: Department of Chemistry, Institute of Chemical Technology, N.M. Parekh Road, Matunga, Mumbai 400 019, Tamilnadu, India.
authors.forename: Shriniwas D
authors.initials: SD
authors.lastname: Samant
keywords: crystal structure