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5-Bromo-N-[(E)-(6-bromo-pyridin-2-yl)methyl-idene]pyridine-3,4-diamine.

ABSTRACT: The title compound, C(11)H(8)Br(2)N(4), is a Schiff base obtained from 6-bromo-picolinaldehyde and 5-bromo-pyridine-3,4-diamine. The mol-ecule has an E configuration about the C=N bond and the dihedral angle between the two pyridine rings is 14.02?(1)°. The observed conformation is stabilised by an intramolecular N-H?N hydrogen bond. In the crystal, mol-ecules are stacked along the b axis and are linked through N-H?N hydrogen bonds into chains along the c axis.

SUBMITTER: Cai M

PROVIDER: S-EPMC3239041 | biostudies-literature | 2011 Dec

REPOSITORIES: biostudies-literature

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5-Bromo-N-[(E)-(6-bromo-pyridin-2-yl)methyl-idene]pyridine-3,4-diamine.

Cai Mingjian M

Acta crystallographica. Section E, Structure reports online 20111123 Pt 12

The title compound, C(11)H(8)Br(2)N(4), is a Schiff base obtained from 6-bromo-picolinaldehyde and 5-bromo-pyridine-3,4-diamine. The mol-ecule has an E configuration about the C=N bond and the dihedral angle between the two pyridine rings is 14.02 (1)°. The observed conformation is stabilised by an intramolecular N-H⋯N hydrogen bond. In the crystal, mol-ecules are stacked along the b axis and are linked through N-H⋯N hydrogen bonds into chains along the c axis. ...[more]

PMID: 22199889

Similar Datasets

(E)-N-[(6-Bromo-pyridin-2-yl)methyl-idene]-4-methyl-aniline.

Project description:The title compound, C(13)H(11)BrN(2), a Schiff base obtained from 6-bromo-picolinaldehyde and p-toluidine, has an E configuration about the C=N bond. The dihedral angle between the benzene and pyridine rings is 30.4?(1)°.

| S-EPMC3200581 | biostudies-literature

(Z)-7-[2-(4-Bromo-phen-yl)hydrazin-1-yl-idene]-6-methyl-3-(pyridin-4-yl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thia-diazine.

Project description:In the asymmetric unit of the title compound, C(16)H(12)BrN(7)S, there are two crystallographically independent mol-ecules with similar conformations. Both mol-ecules are slightly twisted; the central 1,2,4-triazolo[3,4-b]-1,3,4-thia-diazine ring system makes dihedral angles of 9.65?(15) and 13.29?(15)° with the pyridine and benzene rings, respectively, in one mol-ecule, whereas the corresponding values in the other mol-ecule are 9.30?(15) and 4.84?(15)°. A weak intra-molecular C-H?N inter-action with an S(6) ring motif is observed in each mol-ecule. In the crystal, the independent mol-ecules are each linked through N-H?N hydrogen bonds and weak C-H?N interactions into ribbons along the c axis. The ribbons are further linked together by weak C-H?N, C-H?? and ?-? [centroid-centroid distances = 3.572?(2)-3.884?(2)?Å] inter-actions.

| S-EPMC3344618 | biostudies-literature

N'-[(E)-(3-Fluoro-pyridin-2-yl)methyl-idene]pyridine-3-carbohydrazide dihydrate.

Project description:The organic molecule in the title dihydrate, C12H9FN4O·2H2O, exists in the E conformation with respect to the azo-methane C=N double bond. The mol-ecule is approximately planar, with a maximum deviation of 0.117?(1)?Å for the carbonyl O atom from the mean plane of the mol-ecule. Both pyridine rings are essentially coplanar with the central C(=O)N2C unit [dihedral angles = 1.99?(7) and 5.71?(8)°], exhibiting a significant difference in dihedral angles from its benzohydrazide analogue. The crystal packing features N-H?O, O-H?N and O-H?O hydrogen-bond inter-actions, which lead to the formation of a chain along the c-axis direction through one of the water mol-ecules present, and these chains are stacked one over the other by means of ?-? inter-actions [with centroid-centroid distances of 3.7099?(10) and 3.6322?(10)?Å] between the aromatic rings in neighbouring anti-parallel mol-ecules, building a three-dimensional supra-molecular network.

| S-EPMC3998601 | biostudies-literature

Benzoic acid-4-{(1E)-[(E)-2-(pyridin-4-yl-methyl-idene)hydrazin-1-yl-idene]meth-yl}pyridine (2/1).

Project description:In the title co-crystal, C(12)H(10)N(4)·2C(7)H(6)O(2), the complete 4-pyridine-aldazine mol-ecule is generated by a crystallographic centre of inversion. In the crystal, mol-ecules are connected into a three component aggregate via O-H?N hydrogen bonds. As both the benzoic acid [O-C-C-C torsion angle = 174.8?(2)°] and 4-pyridine-aldazine (r.m.s. deviation of the 16 non-H atoms = 0.041?Å) mol-ecules are almost planar, the resulting three-component aggregate is essentially planar. The crystal packing comprises layers of the three-component aggregates of alternating orientation stacked along the b axis; the connections between the mol-ecules are of the types C-H?? and ?-? [pyridine-benzene centroid-centroid distance = 3.787?(4)?Å].

| S-EPMC3009056 | biostudies-literature

N,N'-Bis(5-bromo-pyridin-2-yl)methane-diamine.

Project description:The V-shaped title compound, C(11)H(10)Br(2)N(4), lies on a crystallographic twofold rotation axis which passes through the central C atom. In the crystal, an infinite tape motif, which propagates in the a-axis direction, is formed by inversion-related N-H⋯N hydrogen-bonding inter-actions. The structure confirmed the identity of the compound as a reaction side product.

| S-EPMC3099949 | biostudies-literature

N,N-Bis(pyridin-2-yl-methyl-idene)pyridine-2,6-dicarbohydrazide dimethyl-formamide monosolvate.

Project description:In the crystal of the title compound, C(22)H(22)N(8)O(3), the dicarbohydrazide mol-ecules are linked into a chain along [010] by C-H?N inter-actions involving the pyridyl N atoms and aromatic C-H groups. The DMF mol-ecule is hydrogen bonded with the amide N-H via N-H?O inter-actions. C-H?O inter-actions also occur.

| S-EPMC3009055 | biostudies-literature

Bis{N-methyl-N'-[1-(pyridin-2-yl)ethyl-idene]ethane-1,2-diamine}-zinc bis-(perchlorate).

Project description:The title mononuclear zinc(II) complex, [Zn(C(10)H(15)N(3))(2)](ClO(4))(2), was obtained by the reaction of 2-acetyl-pyridine, N-methyl-ethane-1,2-diamine and zinc perchlorate in methanol. The asymmetric unit of the complex contains two independent [Zn(C(10)H(15)N(3))(2)](2+) cations and four perchlorate anions. The Zn(II) atom in each complex cation is six-coordinated by two pyridine N, two imine N and two amine N atoms from two N-methyl-N'-[1-(pyridin-2-yl)ethyl-idene]ethane-1,2-diamine Schiff base ligands in a distorted octa-hedral geometry. The pyridine rings in each of the complex cations are approximately perpendicular to each other, making dihedral angles of 88.4?(3) and 87.9?(3)°. The perchlorate anions are linked to the complex cations through N-H?O hydrogen bonds.

| S-EPMC3212129 | biostudies-literature

A centrosymmetric monoclinic polymorph of N,N-bis-(pyridin-3-yl-methyl-idene)benzene-1,4-diamine.

Project description:The complete molecule of the title compound, C(18)H(14)N(4), is generated by the application of a centre of inversion. The dihedral angle between the central benzene ring and the pyridine ring is 31.88 (7)°. In the crystal, mol-ecules are stacked in columns along the c axis and several inter-molecular π-π inter-actions are present between the six-membered rings, the shortest centroid-centroid distance being 3.937 (2) Å. The structure reported herein represents a centrosymmetric polymorph of the previously reported non-centrosymmetric (P2(1)) form [Kim et al. (2005 ▶). Bull. Korean Chem. Soc.26, 892-898].

| S-EPMC3200937 | biostudies-literature

Aqua-[6-carboxyl-ato-N'-(pyridin-2-yl-methyl-idene)pyridine-2-carbohydrazidato]copper(II) trihydrate.

Project description:In the title compound, [Cu(C(13)H(8)N(4)O(3))(H(2)O)]·3H(2)O, the complex molecule, except for the aqua ligand, is essentially planar [r.m.s. deviation = 0.034?(2)?Å]. The coordination polyhedron of the Cu(2+) cation is a square-pyramid, with the aqua ligand at the apex. The compound exhibits a three-dimensional structure, which is is stabilized by O-H?O and O--H?N hydrogen bonds and ?-? inter-actions [centroid-centroid distance = 2.987?(3)?Å].

| S-EPMC3379113 | biostudies-literature

Tetra-aqua-bis-[N,N'-bis-(pyridin-3-yl-methyl-idene)benzene-1,4-diamine]-zinc dinitrate 1.49-hydrate.

Project description:In the title compound, [Zn(C(18)H(14)N(4))(2)(H(2)O)(4)](NO(3))(2)·1.49H(2)O, the Zn(II) atom, lying on an inversion center, is coordinated by two N atoms from two N,N'-bis-(pyridin-3-yl-methyl-idene)benzene-1,4-diamine ligands and four water mol-ecules in a distorted octa-hedral geometry. The nitrate anion is disordered over two sets of sites, with an occupancy ratio of 0.744?(4):0.256?(4). The uncoordinated water mol-ecule is also disordered with an occupancy factor of 0.744?(4). O-H?O and O-H?N hydrogen bonds link the complex cations, nitrate anions and uncoordinated water mol-ecules into a supra-molecular layer parallel to (102).

| S-EPMC3238659 | biostudies-literature

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