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5,5'-Dimeth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenol.

ABSTRACT: In the crystal structure of the title compound, C(24)H(24)N(2)O(4), the dihedral angles between the central and the two outer benzene rings are 48.12?(8) and 21.44?(8)°. Intra-molecular O-H?N hydrogen bonding generates S(6) rings.

SUBMITTER: Kargar H

PROVIDER: S-EPMC2983852 | biostudies-other | 2010

REPOSITORIES: biostudies-other

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5,5'-Dimeth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenol.

Kargar Hadi H Kia Reza R Khan Islam Ullah IU Sahraei Atefeh A Aberoomand Azar Parviz P

Acta crystallographica. Section E, Structure reports online 20100303 Pt 4

In the crystal structure of the title compound, C(24)H(24)N(2)O(4), the dihedral angles between the central and the two outer benzene rings are 48.12 (8) and 21.44 (8)°. Intra-molecular O-H⋯N hydrogen bonding generates S(6) rings. ...[more]

PMID: 21580575

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6,6'-Dimeth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenol monohydrate.

Project description:In the title compound, C(24)H(24)N(2)O(4)·H(2)O, the dihedral angles between the central benzene ring and the two outer benzene rings of the Schiff base are 65.06?(9) and 3.02?(9)°. Strong intra-molecular O-H?N hydrogen bonds generate S(6) ring motifs. The H atoms of the water mol-ecule act as donors in the formation of bifurcated O-H?(O,O) inter-molecular hydrogen bonds with the O atoms of the hydr-oxy and meth-oxy groups with R(1) (2)(5) ring motifs; these may influence the mol-ecular conformation.

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{5,5'-Dimeth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}nickel(II).

Project description:In the title Schiff base complex, [Ni(C(24)H(22)N(2)O(4))], the Ni(II) atom shows a square-planar geometry. The dihedral angles between the central benzene ring and the two outer rings are 4.79?(15) and 7.54?(15)°. In the crystal, mol-ecules are connected through inter-molecular C-H?O hydrogen bond, resulting in chains extending along the c axis. The crystal structure is further stabilized by inter-molecular ?-? inter-actions, with centroid-centroid distances in the range 3.3760?(15)-3.7196?(17)?Å.

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{6,6'-Dimeth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}nickel(II).

Project description:In the title Schiff base complex, [Ni(C(24)H(22)N(2)O(4))], the Ni(II) atom has a slightly distorted square-planar coordination environment. The dihedral angles between the central benzene ring and the two outer rings are 7.62?(16) and 9.78?(17)°. The crystal structure is stabilized by inter-molecular C-H?O hydrogen bonds and ?-? inter-actions with a centroid-centroid distance of 3.8218?(19)?Å.

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2,2'-[5-Bromo-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenol.

Project description:A new tetra-dentate unsymmetrical Schiff base, C(20)H(15)BrN(2)O(2), has been synthesized from 4-bromo-o-phenyl-enediamine and salicylaldehyde in refluxing ethanol. The dihedral angles between the two hydroxy-phenyl rings and the bromo-o-phenyl-enediiminatoin group are 68.6?(1) and 8.7?(1)°; the dihedral angle between the two hydroxy-phenyl rings is 70.3?(1)°. There are two relatively strong intra-molecular of O-H?N hydrogen bonds.

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4,4'-Dimethyl-2,2'-[1,2-phenyl-enebis(nitrilo-methyl-idyne)]diphenol.

Project description:In the title Schiff base, C(22)H(20)N(2)O(2), the benzene ring forms dihedral angles of 53.92?(1) and 3.62?(1)° with the two salicylaldimine groups. There are two strong O-H?N intra-molecular hydrogen bonds. The crystal packing is stabilized by weak inter-molecular C-H?O hydrogen bonds and ?-? stacking inter-actions (average distance 3.39?Å).

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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?? inter-actions are observed.

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3,3'-Dimeth-oxy-2,2'-[(4,5-dimethyl-o-phenyl-ene)bis-(nitrilo-methanylyl-idene)]diphenol.

Project description:The asymmetric unit of the title compound, C(24)H(24)N(2)O(4), comprises two crystallographically independent mol-ecules A and B. The dihedral angles between the central dimethyl-substituted benzene ring and the two outer benzene rings are 49.5?(1) and 5.06?(11)° in mol-ecule A, and 42.55?(8) and 5.77?(9)° in mol-ecule B. In each mol-ecule, two strong intra-molecular O-H?N hydrogen bonds generate two S(6) ring motifs. The crystal structure is further stabilized by inter-molecular ?-? [centroid-centroid distances of 3.591?(1)-3.876?(1)?Å] inter-actions.

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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.

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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].

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{6,6'-Dieth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}copper(II).

Project description:In the title complex, [Cu(C(26)H(26)N(2)O(4))], the Cu(II) ion lies on a crystallographic twofold rotation axis and is coordinated in a slightly distorted square-planar environment. The dihedral angle between the central benzene ring and each of the two symmetry-related outer benzene rings is 5.1?(2)°. The crystal structure is stabilized by inter-molecular ?-? inter-actions with centroid-centroid distances in the range 3.466?(2)-3.6431?(16)?Å.

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