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N,N'-Bis(2,6-dichloro-benzyl-idene)propane-1,2-diamine.

ABSTRACT: In the title Schiff base, C(17)H(14)Cl(4)N(2), the atoms of one of the 2,6-dichloro-benzyl-idene units and the central 1,2-diamino-propane grouping are disordered over two sets of sites in a 0.8838 (12):0.1162 (12) ratio. The dihedral angles between the ordered benzene ring and its disordered counterparts are 57.41 (12) and 54.8 (6)° for the major and minor disorder components, respectively. The crystal studied was a racemic twin, the refined ratio of the twin components being 0.37 (5):0.63 (5).

SUBMITTER: Yeap CS

PROVIDER: S-EPMC2983987 | biostudies-literature |

REPOSITORIES: biostudies-literature

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[N,N'-Bis(2,6-dichloro-benzyl-idene)propane-1,3-diamine-?(2)N,N']dibromidozinc.

Project description:In the title compound, [ZnBr(2)(C(17)H(14)Cl(4)N(2))], the Zn(II) ion is bonded to two bromide ions and two N atoms of the diimine ligand and displays a moderately distorted tetra-hedral coordination geometry. The Schiff base ligand acts as a chelating ligand and coordinates to the Zn(II) atom via two N atoms.

| S-EPMC3393222 | biostudies-literature

N,N'-Bis(3,5-dichloro-benzyl-idene)-ethane-1,2-diamine.

Project description:The mol-ecule of the title Schiff base compound, C(16)H(12)Cl(4)N(2), lies across an inversion centre and adopts an E configuration with respect to the azomethine C=N bond. The imine groups are coplanar with the aromatic rings. Within the mol-ecule, the planar units are parallel but extend in opposite directions from the dimethyl-ene bridge. In the crystal structure, mol-ecules are linked together by inter-molecular C-H⋯Cl hydrogen bonds along the a axis.

| S-EPMC2959545 | biostudies-literature

N,N'-Bis-(2,4-dichloro-benzyl-idene)-2,2-dimethyl-propane-1,3-diamine.

Project description:The mol-ecule of the title Schiff base compound, C(19)H(18)Cl(4)N(2), has crystallographic twofold rotation symmetry, with one C atom lying on the rotation axis. The dihedral angle between the two symmetry-related benzene rings is 84.70 (2)°. The plane of the -C=N-C- group is twisted away from the benzene ring by 7.5 (1)°. In the crystal structure, weak inter-molecular Cl⋯Cl [3.4851 (3) Å] contacts link neighbouring mol-ecules into a two-dimensional network parallel to the bc plane.

| S-EPMC2959888 | biostudies-literature

(E,E)-N,N-Bis(2,6-difluoro-benzyl-idene)ethane-1,2-diamine.

Project description:The asymmetric unit of the title compound, C(16)H(12)F(4)N(2), comprises half of the potentially bidentate Schiff base ligand, with an inversion centre located at the mid-point of the central C-C bond. The crystal packing is stabilized by inter-molecular C-H?N and ?-? inter-actions [centroid-centroid distance = 3.6793?(12)?Å and inter-planar spacing = 3.4999?(7)?Å].

| S-EPMC3247492 | biostudies-literature

N,N'-Bis(2,3-dimethoxy-benzyl-idene)propane-1,3-diamine.

Project description:The title compound, C(21)H(26)N(2)O(4), adopts an E configuration with respect to the azomethine C=N bonds. The dihedral angle between the two rings is 8.16?(8)°. The crystal structure is stabilized by weak inter-molecular C-H?O inter-actions.

| S-EPMC2970148 | biostudies-literature

2,6-Bis(2,4-dichloro-benzyl-idene)cyclo-hexa-none.

Project description:The title compound, C(20)H(14)Cl(4)O, was prepared from a mixture of 2,4-dichloro-benzophenone and cyclo-hexa-none. The dihedral angles formed by the cyclohexane ring and two benzene rings are 39.18 (2) and 60.72 (2)°. There are some weak intra-molecular C-H⋯O and C-H⋯Cl hydrogen-bond contacts in the crystal structure.

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N,N'-Bis(3-methoxy-benzyl-idene)ethane-1,2-diamine.

Project description:The mol-ecule of the title bidentate Schiff base ligand, C(18)H(20)N(2)O(2), has twofold crystallographic rotation symmetry, giving one half-mol-ecule per asymmetric unit. It adopts a twisted E configuration with respect to the azomethine C=N bond. The imino group is coplanar with the aromatic ring. The dihedral angle between the two benzene rings is 69.52?(5)°. The meth-oxy group is coplanar with the benzene ring, as indicated by the C-O-C-C torsion angle of -179.56?(8)°. In the unit cell, mol-ecules are linked together by inter-molecular C-H?O hydrogen bonds, forming chains along the a axis; these chains are further stacked down the b axis by both inter-molecular C-H?O and C-H?? inter-actions.

| S-EPMC2960703 | biostudies-literature

N,N'-Bis(2-iodo-benzyl-idene)ethane-1,2-diamine.

Project description:The mol-ecule of the title Schiff base compound, C(16)H(14)I(2)N(2), lies across a crystallographic inversion centre. An intra-molecular C-H?I hydrogen bond forms a five-membered ring, producing an S(5) ring motif. The C=N bond is coplanar with the benzene ring and adopts a trans configuration. Within the mol-ecule, the planar units are parallel, but extend in opposite directions from the dimethyl-ene bridge. An inter-esting feature of the crystal structure is the short I?N [3.2096?(15)?Å] inter-action, which is significantly shorter than the sum of the van der Waals radii of these atoms. In the crystal structure, mol-ecules are linked into one-dimensional extended chains along the c axis and also into one-dimensional extended chains along the b axis through short inter-molecular I?N inter-actions, forming two-dimensional networks parallel to the bc plane.

| S-EPMC2959359 | biostudies-literature

N,N'-Bis(4-bromo-benzyl-idene)ethane-1,2-diamine.

Project description:The mol-ecule of the title Schiff base compound, C(16)H(14)Br(2)N(2), lies across a crystallographic inversion centre and adopts an E configuration with respect to the azomethine C=N bond. 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 dimethyl-ene bridge. The crystal structure is stabilized by inter-molecular C-H⋯π inter-actions and Br⋯Br [3.6307 (4) Å] short contacts.

| S-EPMC2962009 | biostudies-literature

N,N'-Bis(3-bromo-benzyl-idene)ethane-1,2-diamine.

Project description:The mol-ecule of the title Schiff base compound, C(16)H(14)Br(2)N(2), lies across a crystallographic inversion centre. The C=N bond adopts a trans configuration. The imino group is coplanar with the benzene ring. Within the mol-ecule, the planar units are parallel, but extend in opposite directions from the dimethyl-ene bridge. The inter-esting feature of the structure is the weak Br⋯Br inter-action [3.7501 (2) Å] linking the mol-ecules into chains along the c axis. These chains are stacked along the b axis.

| S-EPMC2962103 | biostudies-literature

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