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2,6-Bis(2-chloro-benzyl-idene)cyclo-hexanone.

ABSTRACT: In the title mol-ecule, C(20)H(16)Cl(2)O, the central cyclo-hexa-none ring adopts an envelope conformation. The two aromatic rings form a dihedral angle of 30.0?(1)°. The crystal packing exhibits weak inter-molecular C-H?O hydrogen bonds and short Cl?O contacts [3.213?(3)?Å].

SUBMITTER: Liu D

PROVIDER: S-EPMC2968786 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2,6-Bis(2,4-dimethyl-benzyl-idene)cyclo-hexa-none.

Project description:In the crystal structure of the title compound, C(24)H(6)O, the mol-ecule exhibits point symmetry m but the mirror plane is not utilized as part of the space-group symmetry. The structure contains face-to-face inter-actions between the 2,4-dimethyl-benzyl-idene substituents in which the methyl groups lie directly above the centroids of adjacent benzene rings.

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2,6-Bis(4-methoxy-benzyl-idene)cyclo-hexa-none.

Project description:In the title mol-ecule, C(22)H(22)O(3), the central cyclo-hexa-none ring adopts an envelope conformation. The two outer aromatic rings form a dihedral angle of 19.3 (2)°. The crystal packing exhibits weak inter-molecular C-H⋯O hydrogen bonds.

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2,6-Bis(2,4-dichloro-benzyl-idene)cyclo-hexa-none.

Project description:The title compound, C(20)H(14)Cl(4)O, was prepared from a mixture of 2,4-dichloro-benzophenone and cyclo-hexa-none. The dihedral angles formed by the cyclohexane ring and two benzene rings are 39.18 (2) and 60.72 (2)°. There are some weak intra-molecular C-H⋯O and C-H⋯Cl hydrogen-bond contacts in the crystal structure.

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(2E,6E)-2,6-Bis(2,5-difluoro-benzyl-idene)cyclo-hexa-none.

Project description:In the title compound, C(20)H(14)F(4)O, a derivative of curcumin, the dihedral angle between the two aromatic rings is 27.19?(13)°. The C=C double bonds have an E configuration.

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(2E,6E)-2,6-Bis(2,4,5-trimethoxy-benzyl-idene)cyclo-hexa-none.

Project description:In the title compound, C(26)H(30)O(7), one atom in the cyclo-hexa-none ring is disordered over two positions with a site-occupancy ratio of 0.871?(6):0.129?(6). The dihedral angles formed between the mean plane through the six C atoms of the major component of the cyclo-hexa-none ring and two benzene rings are 35.09?(10) and 34.21?(10)°; the corresponding angles for the minor component are 20.1?(2) and 19.5?(2)°. Both the major and minor disordered components of the cyclo-hexa-none ring adopt half-boat conformations. In the crystal packing, inter-molecular C-H?O hydrogen bonds connect the mol-ecules into a three-dimensional network.

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(2E,6E)-2,6-Bis(4-ethoxy-benzyl-idene)cyclo-hexa-none.

Project description:The title compound, C(24)H(26)O(3), was prepared by the condensation reaction of 4-ethoxy-benzaldehyde with cyclo-hexa-none. The mol-ecule has crystallographic mirror symmetry and exhibits a butterfly-shaped geometry, with a dihedral angle of 5.46 (1)° between the two benzene rings. Weak inter-molecular C-H⋯π inter-actions help stabilize the crystal structure.

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Project description:The title compound, C(20)H(14)Cl(4)O, was prepared by the reaction of 2,6-dichloro-benzaldehyde and cyclo-hexa-none. In the mol-ecule, the central cyclo-hexa-none ring adopts an envelope conformation, while the terminal benzene rings make a dihedral angle of 57.87?(9)°.

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(2E,6E)-2,6-Bis(4-methyl-benzyl-idene)cyclo-hex-3-en-1-one.

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(2E,6E)-2,6-Bis(2-fluoro-5-meth-oxy-benzyl-idene)cyclo-hexan-1-one.

Project description:The title compound, C(22)H(20)F(2)O(3), a derivative of curcumin, crystallized with two independent mol-ecules in the asymmetric unit. The mean planes of the two 2-fluoro-5-meth-oxy-phenyl groups are aligned at 24.88?(11)° in one mol-ecule and 24.19?(15)° in the other. The dihedral angles between the mean plane of the penta-1,4-dien-3-one group and those of the two 2-fluoro-5-meth-oxy-phenyl rings are 51.16?(11) and 49.16?(10)° in the first mol-ecule, and 45.69?(15) and 54.00?(14)° in the second. The mol-ecules adopt E configurations about the central olefinic bonds.

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Bis(4-chloro-benzyl-ammonium) tetra-kis(2,6-diethyl-anilinium) cyclo-hexa-phosphate tetra-hydrate.

Project description:In the crystal of the title hydrated mol-ecular salt, 2C(7)H(9)ClN(+)·4C(10)H(16)N(+)·P(6)O(18) (6-)·4H(2)O, the packing consists of a three-dimensional O-H?O and N-H?O hydrogen-bonded network resulting from the association of anionic layers built up from centrosymmetric cyclohexaphosphate ions and water mol-ecules and the two types of organic cations.

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