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2,2'-[Nonane-1,9-diylbis(nitrilo-methyl-idyne)]diphenol.

ABSTRACT: In the title Schiff base compound, C(23)H(30)N(2)O(2), the complete mol-ecule is generated by crystallographic twofold symmetry, with one C atom lying on the rotation axis. The nonane chain adopts a linear conformation and the hydr-oxy group forms an intra-molecular O-H?N hydrogen bond to the imine group.

SUBMITTER: Abdullah N

PROVIDER: S-EPMC2960073 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature

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2,2'-[Nonane-1,9-diylbis(nitrilo-methyl-idyne)]diphenol.

Abdullah Norbani N Lo Kong Mun KM Tajuddin Hairul Anuar HA Tee Jia Ti JT Ng Seik Weng SW

Acta crystallographica. Section E, Structure reports online 20081129 Pt 12

In the title Schiff base compound, C(23)H(30)N(2)O(2), the complete mol-ecule is generated by crystallographic twofold symmetry, with one C atom lying on the rotation axis. The nonane chain adopts a linear conformation and the hydr-oxy group forms an intra-molecular O-H⋯N hydrogen bond to the imine group. ...[more]

PMID: 21581455

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5,5'-Dimeth-oxy-2,2'-[(nonane-1,9-diyldi-oxy)bis-(nitrilo-methyl-idyne)]diphenol.

Project description:The mol-ecule of the title compound, C(25)H(34)N(2)O(6), adopts a fully extended configuration. The oxime (-CH=N-O-) group is coplanar with the aromatic ring and the two benzene rings are almost parallel, making a dihedral angle of 0.16?(3)°. In the crystal structure, strong intra-molecular O-H?N hydrogen bonds generate six-membered S(6) ring motifs. Inter-molecular C-H?O hydrogen bonds link each mol-ecule to five others, forming an infinite three-dimensional supra-molecular structure. The crystal is further stabilized by ?-? stacking inter-actions between neighbouring benzene rings [centroid-centroid distance = 3.744?(2)?Å].

| S-EPMC2971058 | biostudies-literature

4,4'-Dichloro-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The crystal of the title Schiff base compound, C(19)H(20)Cl(2)N(2)O(2), contains of two crystallographically independent mol-ecules with similar conformations. In each mol-ecule, two intramolecular O-H⋯N bonds generate S(6) motifs. The N atoms are also in close proximity to two H atoms of the dimethyl-propane groups, with H⋯N distances between 2.59 and 2.62 Å. The imine group is coplanar with the benzene ring. The dihedral angles between the benzene rings in the two independent mol-ecules are 58.20 (12) and 47.95 (12)°. The structure displays short inter-molecular Cl⋯Cl [3.3869 (11) Å] and Cl⋯O [3.175 (2)-3.204 (2) Å] inter-actions. The crystal structure is further stabilized by weak inter-molecular C-H⋯O, C-H⋯π and π-π [centroid-centroid distances 3.6416 (13)-3.8705 (14) Å] inter-actions.

| S-EPMC2967979 | biostudies-literature

6,6'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The title Schiff base compound, C(21)H(26)N(2)O(4), exhibits two crystallographically independent mol-ecules in the asymmetric unit with similar conformations. The imino groups are coplanar with the benzene rings; the maximum deviations of the N atoms from the planes comprising the benzene rings and the imino groups are -0.037 (4), 0.013 (4), -0.021 (5), and 0.008 (5) Å. The dihedral angles between the benzene rings in the two mol-ecules are 53.64 (17) and 51.93 (17)°. Strong intra-molecular O-H⋯N hydrogen bonds generate S(6) ring motifs. The N atoms are also in close proximity to the H atoms of the dimethyl-propane groups, with H⋯N distances between 2.54 and 2.75 Å. The crystal structure is further stabilized by weak inter-molecular C-H⋯O hydrogen bonds, weak inter-molecular C-H⋯π inter-actions and π-π contacts involving the imine C atom and two C atoms from the adjacent benzene rings.

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5,5'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The asymmetric unit of the title Schiff base compound, C(21)H(26)N(2)O(4), consists of four crystallographically independent mol-ecules, viz. A, B, C and D. The A and D, and the B and C mol-ecules are related by a pseudo-inversion centre, and the remaining pairs of mol-ecules differ in the orientations of one of the meth-oxy groups. In each independent mol-ecule, intra-molecular O-H⋯N hydrogen bonds generate two S(6) ring motifs. The dihedral angles between the benzene rings in mol-ecules A, B, C and D are 65.86 (19), 50.41 (19), 68.59 (19) and 50.85 (19)°, respectively. In the crystal structure, mol-ecules are linked by C-H⋯O hydrogen bonds, forming R(2) (2)(8) dimers. In addition, weak C-H⋯π inter-actions are observed.

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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.

| S-EPMC2971247 | biostudies-literature

4,4'-[Piperazine-1,4-diylbis(propyl-ene-nitrilo-methyl-idyne)]diphenol.

Project description:In the title mol-ecule, C(24)H(32)N(4)O(2), the piperazine ring adopts a chair conformation and the dihedral angle between the two benzene rings is 35.4?(1)°. In the crystal structure, inter-molecular O-H?N hydrogen bonds link mol-ecules into chains along [001].

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{3,3',5,5'-Tetra-meth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenol-ato}-copper(II).

Project description:In the title square-planar copper complex, [Cu(C(20)H(22)N(2)O(6))], the Cu-N and Cu-O bond lengths are significantly longer than those of its isostructural nickel analog. The title structure is related to that of the corresponding monohydrate. There are significant differences in the conformations of the two complexes. While the monohydrate is mainly planar, in the title compound there is a slight twist in the two benzene rings at each end of the complex [dihedral angle = 13.14?(6)°]. All the atoms of the meth-oxy substitutents are in the plane of the ring to which they are attached (r.m.s. deviation = 0.0079?Å) except for one of the meth-oxy C atoms, which deviates slightly [0.309?(4)?Å]. In the crystal, weak C-H?O inter-molecular inter-actions link the mol-ecules.

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A second tricilinc polymorph of 6,6'-dieth-oxy-2,2'-[propane-1,2-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The title Schiff base compound, C(21)H(26)N(2)O(4), is a second triclinic polymorph of a previously reported room-temperature structure [Jia (2009 ▶). Acta Cryst. E65, o646]. Strong intra-molecular O-H⋯N hydrogen bonds generate S(6) ring motifs. Inter-molecular C-H⋯O inter-actions link neighbouring mol-ecules into dimers with an R(2) (2)(16) ring motif. The mean planes of the two benzene rings are almost perpendicular to each other, making a dihedral angle of 88.24 (5)°. An inter-esting feature of the crystal structure is the intermolecular short C⋯O [3.1878 (13) Å] contact which is shorter than the sum of the van der Waals radii of the relevant atoms. The crystal structure is further stabilized by inter-molecular C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.7414 (6) Å]. The structure has a stereogenic centre but the space group is centrosymmetric, so the mol-ecule exists as a racemate.

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4,4',6,6'-Tetra-hydro-seleno-2,2'-[(E,E)-cyclo-hexane-1,2-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:In the title mol-ecule, C(20)H(22)N(2)O(2)Se(4), the dihedral angle between the pendant aromatic rings is 67.1 (2)°. The conformation is stabilized by two intra-molecular O-H⋯N hydrogen bonds.

| S-EPMC2969991 | biostudies-literature

6,6'-Dimeth-oxy-2,2'-[pyridine-2,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:In the title compound, C(21)H(19)N(3)O(4), two intramolecular N-H?O hydrogen bonds generate two six-membered rings. The dihedral angles between the central heterocyclic ring and the two pendant rings are 61.5?(2) and 63.5?(1)°.

| S-EPMC2980064 | biostudies-other

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