9-(2,4-Di-fluoro-phen-yl)-3,3,6,6-tetra-methyl-3,4,5,6,7,9-hexa-hydro-2H-xanthene-1,8-dione.

Rizwana Begum, S; Hema, R; Sumathi, G; Valliappan, R; Srinivasan, N

Rizwana Begum, S; Hema, R; Sumathi, G; Valliappan, R; Srinivasan, N.

Afiliación

Rizwana Begum S; Department of Physics, Seethalakshmi Ramaswami College (Autonomous), Tiruchirappalli 620 002, India.
Hema R; Department of Physics, K. Ramakrishnan College of Engineering, Samayapuram, Tiruchirappalli 621 112, India.
Sumathi G; Department of Chemistry, Sri Krishna Engineering College, Panapakkam, Thambaram 601 301, India.
Valliappan R; Department of Chemistry, Chemistry Wing DDE, Annamalai University, Annamalainagar 608 002, India.
Srinivasan N; Department of Chemistry, S.K.P. Engineering College, Thiruvanamalai 606 611, India.

Acta Crystallogr Sect E Struct Rep Online ; 70(Pt 3): o276-7, 2014 Mar 01.

Article en En | MEDLINE | ID: mdl-24764989

RESUMEN

In the title compound, C23H24F2O3, the central pyran ring has a flat-boat conformation, whereas the two fused cyclo-hexenone rings adopt envelope conformations, with the C atom bearing the dimethyl substituent being the flap atom in each case. The pyran ring mean plane and the di-fluoro-phenyl ring are almost normal to each other, making a dihedral angle of 87.55â(4)°. In the crystal, mol-ecules are linked by pairs of C-Hâ¯O hydrogen bonds, forming inversion dimers with an R 2 (2)(8) ring motif. The F atom at position 2 on the di-fluoro-phenyl ring is disordered over the 2- and 6-positions, and has a refined occupancy ratio of 0.932â(3):0.068â(3).

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Acta Crystallogr Sect E Struct Rep Online Año: 2014 Tipo del documento: Article País de afiliación: India Pais de publicación: Estados Unidos

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