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

ABSTRACT: 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.

SUBMITTER: Yeap CS

PROVIDER: S-EPMC2967979 | biostudies-literature |

REPOSITORIES: biostudies-literature

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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.

| S-EPMC2967940 | biostudies-literature

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.

| S-EPMC2959808 | biostudies-literature

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

{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.

| S-EPMC3414174 | biostudies-literature

{4,4'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenolato}nickel(II).

Project description:In the title complex, [Ni(C(21)H(24)N(2)O(4))], the Ni(II) ion has a slightly distorted square-planar geometry, coordinated by the two N and two O atoms of a new tetra-dentate Schiff base ligand. The dihedral angle between the planes of the two NiNC(3)O chelate rings is 14.37?(12)°.

| S-EPMC2969458 | biostudies-literature

{4,4'-Dibromo-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenolato-κO,N,N',O'}copper(II).

Project description:In the title compound, [Cu(C(19)H(18)Br(2)N(2)O(2))], the Cu(II) ion is in a tetra-hedrally distorted planar geometry, involving two N and two O atoms from the tetra-dentate Schiff base ligand. Inter-molecular C-H⋯O hydrogen bonds form an eight-membered R(2) (2)(8) motif. The dihedral angle betwen two benzene rings is 36.34 (9)°. There are inter-molecular Cu⋯Br [3.4566 (5) Å] and Cu⋯·N [3.569 (3) Å] contacts, which are significantly shorter than the sum of van der Waals radii of the relevant atoms. These inter-actions, along with the inter-molecular C-H⋯π and π-π [centroid-centroid distances of 3.709 (1) and 3.968 (2) Å] inter-actions, link neighbouring mol-ecules into a one-dimensional infinite chain along the c axis.

| S-EPMC2959884 | biostudies-literature

4,4'-[Propane-1,3-diylbis(nitrilo-methyl-idyne)]dibenzonitrile.

Project description:The mol-ecule of the title Schiff base compound, C(19)H(16)N(4), has crystallographic twofold rotation symmetry. The imino group is coplanar with the aromatic ring. Within the mol-ecule, the planar units are parallel, but extend in opposite directions from the central methyl-ene bridge. The packing of the mol-ecules is controlled by C-H⋯π inter-actions.

| S-EPMC2961763 | biostudies-literature

4,4'-[2,2-Dimethyl-propane-1,3-diyl-bis(nitrilo-methyl-idyne)]dibenzonitrile.

Project description:The title compound, C(21)H(20)N(4), is a bidentate Schiff base ligand. An intra-molecular C-H⋯N hydrogen bond forms a five-membered ring, producing an S(5) ring motif. The cyano and imino [-C(H(2))-N=C-] functional groups are coplanar with the benzene ring in each half of the mol-ecule. The packing of the mol-ecules is controlled by C-H⋯π and π-π inter-actions [centroid-to-centroid distance = 3.6944 (8) Å].

| S-EPMC2961864 | biostudies-literature

{4,4'-Dichloro-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methanyl-ylidene)]diphenolato-κO,N,N',O'}nickel(II).

Project description:In the title compound, [Ni(C(19)H(18)Cl(2)N(2)O(2))], the Ni(II) atom shows a slightly distorted square-planar geometry. The dihedral angle between the mean planes of the coordination rings is 9.15 (12)° while the dihedral angle between the mean planes of the two aromatic rings is 3.48 (16)°. In the crystal, pairs of inter-molecular C-H⋯O hydrogen bonds link neighboring mol-ecules into a chain along the a axis. The crystal structure is further stabilized by π-π inter-actions [centroid-centroid distance = 3.883 (2) Å].

| S-EPMC3151962 | biostudies-literature

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

Project description:The asymmetric unit of the title compound, [Cu(C(21)H(24)N(2)O(2))]·H(2)O, comprises half of a Schiff base complex and half of a water mol-ecule. The whole compound is generated by crystallographic twofold rotation symmetry. The geometry around the Cu(II) atom, located on a twofold axis, is distorted square-planar, which is supported by the N(2)O(2) donor atoms of the coordinating Schiff base ligand. The dihedral angle between the symmetry-related benzene rings is 47.5 (4)°. In the crystal, the water mol-ecule that is hydrogen bonded to the coordinated O atoms links the mol-ecules via O-H⋯O inter-actions into chains parallel to [001]. The crystal structure is further stabilized by C-H⋯π inter-actions, and by π-π inter-actions involving inversion-related chelate rings [centroid-centroid distance = 3.480 (4) Å].

| S-EPMC3435595 | biostudies-literature

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