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3-Phenyl-6-(2-pyrid-yl)-1,2,4,5-tetra-zine.

ABSTRACT: The title compound, C(13)H(9)N(5), is the first asymmetric diaryl-1,2,4,5-tetra-zine to be crystallographically characterized. We have been inter-ested in this motif for incorporation into supra-molecular assemblies based on coordination chemistry. The solid state structure shows a centrosymmetric mol-ecule, forcing a positional disorder of the terminal phenyl and pyridyl rings. The mol-ecule is completely planar, unusual for aromatic rings with N atoms in adjacent ortho positions. The stacking observed is very common in diaryl-tetra-zines and is dominated by π stacking [centroid-to-centroid distance between the tetrazine ring and the aromatic ring of an adjacent molecule is 3.6 Å, perpendicular (centroid-to-plane) distance of about 3.3 Å].

SUBMITTER: Chartrand D

PROVIDER: S-EPMC2914999 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4,4'-(1,2,4,5-Tetra-zine-3,6-di-yl)dibenzo-nitrile.

Project description:Mol-ecules of the title compound, C(16)H(8)N(6), lie on crystallographic inversion centres. A dihedral angle of 16.1 (1)° is formed between the central tetra-zine ring and the plane of each cyano-phenyl group. The mol-ecules form stacks along [100] with a perpendicular inter-planar separation of 3.25 (1) Å. C-H⋯N inter-actions are formed between mol-ecules in neighbouring stacks.

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3,6-Bis(4-chloro-phen-yl)-N,N-bis-(1-phenyl-eth-yl)-1,2,4,5-tetra-zine-1,4-di-carboxamide.

Project description:In the title mol-ecule, C(32)H(28)Cl(2)N(6)O(2), the amide-substituted N atoms of the tetra-zine ring deviate from the approximate plane of the four other atoms in the ring by 0.468?(3) and 0.484?(3)?Å, forming a boat conformation. The dihedral angle between the two phenyl rings is 67.0?(1)° and that between the two chloro-substituted benzene rings is 73.8?(1)°. Two intra-molecular N-H?N hydrogen bonds are observed.

| S-EPMC3297322 | biostudies-literature

6-Methyl-N-(2-methyl-phen-yl)-3-phenyl-1,6-dihydro-1,2,4,5-tetra-zine-1-carbox-amide.

Project description:In the title compound, C(17)H(16)N(5)O, the central tetra-zine ring adopts an unsymmetrical boat conformation with the two C atoms as flagpoles. This compound can be considered as having homoaromaticity. The crystal structure is stabilized by inter-molecular C-H⋯O inter-actions between a benzene H atom and the carbonyl O atom.

| S-EPMC2962064 | biostudies-literature

(3,6-Dimethyl-1,2,4,5-tetra-zine-1,4-di-yl)bis-[(morpholin-4-yl)methanone].

Project description:In the title mol-ecule, C(14)H(22)N(6)O(4), the amide-substituted N atoms of the tetra-zine ring deviate from the approximate plane of the four other atoms in the ring by 0.160 (2) and 0.243 (2) Å, forming a slight boat conformation. The morpholine rings are in chair conformations.

| S-EPMC3295465 | biostudies-literature

Erratum: 6-Methyl-N-(2-methyl-phen-yl)-3-phenyl-1,6-dihydro-1,2,4,5-tetra-zine-1-carbox-amide. Corrigendum.

Project description:The formula of the title compound in the paper by Xu & Hu [Acta Cryst. (2008), E64, o1432] is corrected.[This corrects the article DOI: 10.1107/S1600536808020199.].

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3,6-Dimethyl-N,N-bis-(pyridin-2-yl)-1,2,4,5-tetra-zine-1,4-dicarboxamide.

Project description:In the title mol-ecule, C(16)H(16)N(8)O(2), four atoms of the tetra-zine ring are coplanar, with the largest deviation from the plane being 0.0236 (12) Å; the other two atoms of the tetra-zine ring deviate on the same side from this plane by 0.320 (4) and 0.335 (4) Å. Therefore, the central tetra-zine ring exhibits a boat conformation. The dihedral angles between the mean plane of the four coplanar atoms of the tetrazine ring and the two pyridine rings are 26.22 (10) and 6.97 (5)°. The two pyridine rings form a dihedral angle of 31.27 (8)°. In the molecule, there are a number of short C-H⋯O interactions. In the crystal, molecules are linked via a C-H⋯O interaction to form zigzag chains propagating along the [010] direction.

| S-EPMC3295480 | biostudies-literature

catena-Poly[[[(triphenyl-phosphane)copper(I)]-di-μ-iodido-[(triphenyl-phosphane)copper(I)]-μ-[3,6-bis-(4-pyrid-yl)-1,2,4,5-tetra-zine]] acetonitrile disolvate].

Project description:The title compound, {[Cu(2)I(2)(C(12)H(8)N(6))(C(18)H(15)P)(2)]·2CH(3)CN}(n), contains centrosymmetric dinuclear Cu(2)I(2)(PPh(3))(2) units bridged by 3,6-bis-(4-pyrid-yl)-1,2,4,5-tetra-zine ligands lying also across crystallographic inversion centers, giving a chain structure in the ab plane. The distorted tetra-hedral Cu(I) atoms in the dinuclear unit are coordinated by two bridging iodide anions, one pyridine N atom from the substituted tetra-zine ligand and one terminal triphenyl-phosphine P-atom donor. The Cu⋯Cu distance is 2.8293 (12) Å, implying a weak Cu⋯Cu inter-action.

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3,6-Dimethyl-N,N-bis-(1-phenyl-eth-yl)-1,4-dihydro-1,2,4,5-tetra-zine-1,4-dicarboxamide.

Project description:In the title mol-ecule, C(22)H(26)N(6)O(2), the central tetra-zine ring exhibits a boat conformation, and the two phenyl rings form a dihedral angle of 88.39?(6)°. In the crystal, weak N-H?O and C-H?O hydrogen bonds link mol-ecules into layers parallel to the ab plane.

| S-EPMC3275185 | biostudies-other

Crystal structure of 3,6-bis-(2-chloro-phen-yl)-1,2,4,5-tetra-zine: the acaricide clofentezine.

Project description:The whole molecule of the title compound, C14H8Cl2N4, is generated by inversion symmetry. The dihedral angle between the 2-chloro-phenyl ring and the tetra-zine ring is 47.65?(5)°. In the crystal, mol-ecules are linked by slipped parallel ?-? inter-actions [centroid-centroid distance = 3.8199?(5), normal distance = 3.3127?(8), slippage 1.902?Å] forming columns along the a-axis direction.

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Diethyl 1,4-bis-(4-nitro-phen-yl)-1,4-dihydro-1,2,4,5-tetra-zine-3,6-dicarboxyl-ate.

Project description:The complete mol-ecule of the title compound, C(20)H(18)N(6)O(8), is generated by a crystallographic twofold axis. The dihedral angle between the nitrobenzene rings is 43.5 (2)°. The central six-membered ring exhibits a boat conformation. In the crystal structure, weak inter-molecular C-H⋯O inter-actions are observed.

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