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4,4'-Dibromo-2,2'-[octane-1,8-diylbis(nitrilo-methanylyl-idene)]diphenol.

ABSTRACT: The title compound, C(22)H(26)Br(2)N(2)O(2), has a centre of inversion that is located in the middle of the octyl chain; the chain displays an extended zigzag conformation. A short intra-molecular O-H⋯N hydrogen bond occurs.

SUBMITTER: Ha K

PROVIDER: S-EPMC3200938 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4,4'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:In the title compound, C(21)H(26)N(2)O(4), the dihedral angle between the substituted benzene rings is 30.47 (15) °. Two strong intra-molecular O-H⋯N hydrogen bonds generate two S(6) ring motifs.

| S-EPMC3052006 | biostudies-literature

A monoclinic polymorph of (R,R)-4,4'-dibromo-2,2'-[cyclo-hexane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(20)H(20)Br(2)N(2)O(2), a tetra-dentate Schiff base, is the enanti-omerically pure R,R-diastereomer of four possible stereoisomers. The mol-ecular structure reveals two strong intra-molecular O-H⋯N hydrogen bonds between the hy-droxy O atom and the imino N atom, which each generate S(6) rings. In the crystal, mol-ecules are stacked in columns along the a axis; when viewed down the b axis, successive columns are stacked in the opposite direction. The structure reported herein is the monoclinic polymorph of the previously reported ortho-rhom-bic form [Yi & Hu (2009 ▶). Acta Cryst. E65, o2643], in which the complete mol-ecule is generated by a crystallographic twofold axis.

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2,2'-[Naphthalene-1,5-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(24)H(18)N(2)O(2), lies about an inversion centre and the asymmetric unit contains one half-mol-ecule. An intra-molecular O-H?N hydrogen bond generates a six-membered ring, producing an S(6) ring motif. The crystal packing exhibits inter-molecular ?-? stacking inter-actions between the aromatic rings with a centroid-centroid distance of 3.851?(2)?Å.

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4,4',6,6'-Tetra-tert-butyl-2,2'-[butane-1,4-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(34)H(52)N(2)O(2), is centrosymmetric, the mid-point of the central C-C bond being located on an inversion centre. Intra-molecular O-H⋯N and weak C-H⋯O hydrogen bonds are observed, but no significant inter-molecular inter-actions occur in the crystal structure.

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4,4',6,6'-Tetra-chloro-2,2'-[(1E,1'E)-propane-1,3-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(17)H(14)Cl(4)N(2)O(2), is generated by crystallographic twofold symmetry. The two benzene rings are inclined to one another by 80.17?(10)°. There are two intra-molecular O-H?N hydrogen bonds, which make S(6) ring motifs. In the crystal, mol-ecules are linked by C-H?O and weak C-H?Cl inter-actions, forming a three-dimensional network.

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4,4'-Dibromo-2,2'-[m-phenyl-enebis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(20)H(14)Br(2)N(2)O(2), is a dibasic tetra-dentate Schiff base and reveals intra-molecular O-H?N hydrogen bonds between the hy-droxy O atoms and the imino N atoms. The dihedral angle between the central and terminal benzene rings is 39.7?(1)°. In the crystal, the compound is disposed about a crystallographic mirror plane parallel to the ac plane passing through the two central C atoms. The mol-ecules are stacked in columns along the c axis through ?-? inter-actions, the shortest centroid-centroid distance being 3.872?(3)?Å.

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6,6'-Dieth-oxy-2,2'-[hexane-1,6-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(24)H(32)N(2)O(4), is a polydentate Schiff base and reveals strong intra-molecular O-H?N hydrogen bonding between the hy-droxy O atom and the imino N atom, with an O?N distance of 2.570?(3)?Å. In the crystal, a centre of inversion is located at the mid-point of the compound. The diimino-hexyl-ene chain is almost ideally in the anti conformation, with an average dihedral angle of 179.0°.

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(R,R)-4,4'-Dibromo-2,2'-[cyclo-hexane-1,2-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The mol-ecule of the title compound, C(20)H(20)Br(2)N(2)O(2), lies on a twofold axis. It contains two stereogenic C atoms with R chirality and thus it is the enatiomerically pure R,R-diastereomer. There is an intra-molecular O-H?N hydrogen bond.

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{4,4'-Dichloro-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methanylyl-idene)]diphenolato}copper(II).

Project description:In the title Schiff base complex, [Cu(C(19)H(18)Cl(2)N(2)O(2))], the Cu(II) ion is coordinated in a distorted square-planar environment by two N atoms and two O atoms of the tetra-dentate ligand. The dihedral angle between the benzene rings is 36.86?(14)°. In the crystal, mol-ecules are linked into inversion dimers by pairs of weak C-H?O hydrogen bonds. In addition, ?-? [centroid-centroid distance = 3.7279?(16)?Å] and weak C-H?? inter-actions are observed.

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(±)-trans-6,6'-Dieth-oxy-2,2'-[cyclo-hexane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenol monohydrate.

Project description:In the title hydrate, C24H30N2O4·H2O, the organic mol-ecule adopts an E conformation with respect to the azomethine double bonds. The cyclo-hexane ring is in a chair conformation. The dihedral angle between benzene rings is 79.6 (2)°. Two intra-molecular O-H⋯N hydrogen bonds are present. In the crystal, the components are linked by O-H⋯O hydrogen bonds and weak C-H⋯π inter-actions, generating a three-dimensional supramolecular architecture.

| S-EPMC3998335 | biostudies-literature

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