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1,4-Bis{4-[bis-(prop-2-yn-1-yl)amino]-phen-oxy}benzene.

ABSTRACT: The asymmetric unit of the title compound, C(30)H(24)N(2)O(2), contains two independent mol-ecules, which both lie on centers of inversion. The central phenyl-ene ring is inclined at 61.4 (2)° with respect to the flanking aromatic ring [dihedral angle = 70.7 (3)° in the second mol-ecule].

SUBMITTER: Shah K

PROVIDER: S-EPMC3051971 | biostudies-literature |

REPOSITORIES: biostudies-literature

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1,4-Bis(4-amino-phen-oxy)benzene.

Project description:The title compound, C(18)H(16)N(2)O(2), is a precusor for the synthesis of polyimides. The mol-ecule is located on a crystallographic inversion center and the terminal amino-phen-oxy rings are almost perpendicular to the central benzene ring with a dihedral angle of 85.40?(4)°. The mol-ecular conformation is stabilized by N-H?O and N-H?N inter-molecular hydrogen-bonding inter-actions.

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Project description:The title compound, C(18)H(30)O(2), was prepared by Friedel-Crafts alkyl-ation of 1,4-dimeth-oxy-benzene with 2-methyl-2-butanol. The complete mol-ecule is generated by the application of a crystallographic centre of inversion. The two meth-oxy groups are oriented in the same plane of the aromatic ring [C-C-O-C torsion angle = 9.14?(16)°]. While one methyl group of the tert-pentyl substituent is coplanar with the benzene ring [C-C-C-C = 0.45?(15)°] and lies towards the less-hindered H atom, the other methyl and ethyl groups are directed to either side of the benzene ring [C-C-C-C torsion angles = 118.78?(12) and 59.11?(14)°, respectively]. In the crystal, the hydro-phobic mol-ecules pack to form a brick-wall-like architecture.

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Project description:The mol-ecule of the title compound, C(19)H(14)Cl(2)O(2), has two benzene rings connected to a methyl-ene C atom, and the rings are aligned at 66.3?(1)°. Inter-molecular C-H?? and ?-? stacking inter-actions are observed in the crystal structure, the centroid-centroid distances between parallel benzene rings being 3.7529?(12) and 3.6201?(12)?Å, respectively.

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Project description:The mol-ecule of the title compound, C(22)H(26)O(2), exhibits C(i) mol-ecular symmetry with a crystallographic inversion centre at the mid-point of the central C-C bond. A kink in the mol-ecule is defined by the torsion angle of 66.7?(2)° about this central bond of the alkyl bridge.

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1,4-Bis(3-chloro-prop-oxy)benzene.

Project description:The mol-ecule of the title compound, C(12)H(16)Cl(2)O(2), has a center of inversion at the centroid of the benzene ring and the asymmetric unit contains one half-mol-ecule. Inter-molecular C-H?? inter-actions stabilize the crystal structure.

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tert-Butyl N-{2-[bis-(prop-2-yn-1-yl)amino]-phen-yl}carbamate.

Project description:In the crystal of the title compound, C(17)H(20)N(2)O(2), the molecules are linked by C-H?O interactions. Intra-molecular C-H?O and N-H?N hydrogen bonds also occur.

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Project description:In the title compound, C(13)H(10)O(3), two prop-2-yn-yloxy groups are attached to the benzaldehyde ring at positions 2 and 6. The crystal packing features C-H⋯O inter-actions.

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4-(Prop-2-yn-1-yl-oxy)benzene-1,2-dicarbonitrile.

Project description:In the title compound, C(11)H(6)N(2)O, the complete mol-ecule is generated by the application of crystallographic twofold symmetry (the mol-ecule is disordered about this axis). The prop-2-yn-1-yl residue is slightly twisted out of the plane of the benzene ring [C-O-C-C torsion angle = 173.1?(3)°] and is orientated away from the nitrile substituents. In the crystal, supra-molecular chains along the a axis, arising from C-H?N inter-actions, are connected into stacks along the c axis by ?-? inter-actions between the benzene rings [centroid-centroid distance = 3.6978?(6)?Å = length of the c axis].

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1,4-Dimeth-oxy-2,5-bis-{2-[4-(trifluoro-meth-yl)phen-yl]ethyn-yl}benzene.

Project description:The asymmetric unit of the title compound, C(26)H(16)F(6)O(2), contains one half of the mol-ecule situated on an inversion centre. In the rod-like mol-ecule, the two terminal benzene rings form a dihedral angle of 71.9 (1)° with the central benzene ring. The trifluoro-methyl group is rotationally disordered over two orientations in a 0.53 (1):0.47 (1) ratio. The crystal packing exhibits no classical inter-molecular inter-actions.

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1,4-Bis[(2,6-dimethoxy-phen-yl)ethyn-yl]benzene.

Project description:The title compound, C(26)H(22)O(4), is a derivative of 1,4-bis-(phenyl-ethyn-yl)benzene substituted by four meth-oxy groups at the terminal benzene rings. The asymmetric unit consists of two half-molecules; one centrosymmetric molecule is planar but the other is non-planar, with dihedral angles of 67.7?(1)° between the central benzene ring and the terminal benzene rings. In the crystal structure, mol-ecules form a zigzag mol-ecular network due to ?-? [the inter-planar and centroid-centroid distances between the benzene rings are 3.50?(1) and 3.57?(1)?Å, respectively] and C-H?? inter-actions (2.75?Å). Introduction of the four meth-oxy groups results in the supra-molecular architecture.

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