title: Fully and partially fluorinated flavone derivatives.
abstract: In the crystal structures of the fully and partially fluorinated flavone derivatives 5,6,7,8-tetrafluoro-2-(2,3,4,5,6-pentafluorophenyl)-4H-1-benzopyran-4-one, C(15)HF(9)O(2), (I), and 5,6,7,8-tetrafluoro-2-phenyl-4H-1-benzopyran-4-one, C(15)H(6)F(4)O(2), (II), the pentafluorophenyl group and the pyranone moiety in (I) are twisted due to repulsion of the F substituents, and a CO(delta(-))...pi(delta(+)) intermolecular interaction is observed between the carbonyl O atom and the pentafluorophenyl group. In (II), on the other hand, the phenyl group and the pyranone moiety are almost coplanar, and arene-perfluoroarene interactions are observed in the head-to-tail intermolecular columnar stacking between the phenyl group and the tetrafluorophenylene moiety.
authors.affiliation: School of Science, Kitasato University, Kitasato 1-15-1, Sagamihara, Kanagawa 228-8555, Japan. hori@kitasato-u.ac.jp
authors.forename: Akiko
authors.initials: A
authors.lastname: Hori
authors.forename: Kohei
authors.initials: K
authors.lastname: Naganuma
mesh_terms: D018360:Crystallography, X-Ray; D047309:Flavones / Q000737:chemistry*; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D013237:Stereoisomerism; D005466:Fluorocarbons
chemical_list: D047309:Flavones; D006845:Hydrocarbons, Fluorinated; C550754:5,6,7,8-tetrafluoro-2-(2,3,4,5,6-pentafluorophenyl)-4H-1-benzopyran-4-one; D005466:Fluorocarbons