2-(4-Chlorophenyl)-6-methoxychroman-4-one

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2-(4-Chloro­phen­yl)-6-meth­oxy­chroman-4-one

In the title mol-ecule, C(16)H(13)Cl O(3), the two aromatic rings form a dihedral angle of 65.3 (1)°. In the crystal structure, weak inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers, which are further packed into columns propagating in [100] by weak C-H⋯π inter-actions.

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4-[(2-Benzoyl-4-chlorophenyl)diazenyl]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

In the title compound, C(23)H(17)ClN(4)O(2), the amino H atom forms an intra-molecular hydrogen bond to the exocyclic carbonyl O atom as well as to the O atom of the benzoyl group.

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(4-Chlorobenzoyl)(4-chlorophenyl)amino 3-(2-nitrophenyl)propanoate

In the title hydroxamic acid derivate, C22H16Cl2N2O5, the nitro-substituted benzene ring forms dihedral angles of 14.11 (15) and 16.08 (15)°, with the 4-chloro-benzoyl and 4-chloro-phenyl benzene rings, respectively. The dihedral angle between the chloro-substituted benzene rings is 2.28 (13)°. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, forming chains along [100].

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6-Chloro-4-(4-methyl­phen­oxy­meth­yl)-2H-chromen-2-one

In the title compound, C(17)H(13)ClO(3), the coumarin and phen-oxy moieties are essentially co-planar, making a dihedral angle of 1.99 (7)°. The phen-oxy moiety is oriented anti-periplanar with respect to the coumarin ring as indicated by the C-C-O-C angle of -179.97 (16)°. In the crystal, the sheet-like packing is stabilized by inter-molecular C-H⋯O and C-H⋯Cl hydrogen bonds.

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2-(4-Bromo­phen­yl)-6-methyl-4H-1-benzopyran-4-one (4′-bromo-6-methyl­flavone)

Planar (r.m.s. deviation from the plane through all non-H atoms = 0.036 Å) mol-ecules of the title compound, C(16)H(11)BrO(2), form a layered structure stabilized by C-H⋯O hydrogen bonds and π-π stacking inter-actions.

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ژورنال

عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online

سال: 2010

ISSN: 1600-5368

DOI: 10.1107/s1600536810035816