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N,N,N',N'-Tetra-ethyl-pyridine-2,6-dicarboxamide.

ABSTRACT: The title compound, C(15)H(23)N(3)O(2), crystallizes with two mol-ecules in the asymmetric unit which are linked by a C-H?N hydrogen bond. In the crystal, mol-ecules are connected via weak C-H?O and C-H?N hydrogen bonds between the amide O atoms and ethyl chains and between pyridine N atoms and aromatic H atoms in para positions. C-H?? inter-actions also occur.

SUBMITTER: Pojarova M

PROVIDER: S-EPMC3238864 | biostudies-other | 2011 Dec

REPOSITORIES: biostudies-other

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N,N,N',N'-Tetra-ethyl-pyridine-2,6-dicarboxamide.

Pojarová Michaela M Dušek Michal M Makrlík Emanuel E Babain Vasily A VA

Acta crystallographica. Section E, Structure reports online 20111105 Pt 12

The title compound, C(15)H(23)N(3)O(2), crystallizes with two mol-ecules in the asymmetric unit which are linked by a C-H⋯N hydrogen bond. In the crystal, mol-ecules are connected via weak C-H⋯O and C-H⋯N hydrogen bonds between the amide O atoms and ethyl chains and between pyridine N atoms and aromatic H atoms in para positions. C-H⋯π inter-actions also occur. ...[more]

PMID: 22199717

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Project description:The title compound, C(15)H(22)BrN(3)O(2), consists of a pyridine ring with a bromine atom in the para position and two diethyl-amide groups in the ortho positions of the ring. Despite the positions of the three substituents on the pyridine ring, the mol-ecule does not exhibit either local or crystallographic twofold symmetry as the two diethyl-amido units exhibit significantly different N(py)-C-C-N(am) torsion angles of 46.3?(4) and 62.7?(4)° (py is pyridine and am is amine). Inter-molecular C-H?O inter-actions support the packing.

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Project description:The asymmetric unit of the title compound, C(23)H(23)N(3)O(2), contains two mol-ecules in both of which, one amide N atom is in a syn position with respect to the pyridine N atom, while the other amide N atom is in an anti position (the syn--anti conformation). There are minor conformational differences between the two mol-ecules, as reflected in the N(pyridine)-C-C-N(amide) torsion angles of -44.9?(3) and 136.0?(2)° for one mol-ecule and 43.5?(3) and -131.1?(2)° for the other mol-ecule. However, the two mol-ecules show significant differences in the orientation of an ethyl group, with corresponding C-C-N-C torsion angles of 86.6?(3)° for one mol-ecule and 79.6?(3)° for the other mol-ecule. In the crystal, mol-ecules are linked by weak C-H?O hydrogen bonds, forming a three-dimensional supra-molecular network.

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Tetra-kis(2,6-diamino-pyridinium) diphthalate 2,6-diamino-pyridine.

Project description:In the title compound, 4C(5)H(8)N(3) (+)·2C(8)H(4)O(4) (2-)·C(5)H(7)N(3), the asymmetric unit consists of two protonated diamino-pyridine cations, one phthalate anion and one half of a diamino-pyridine mol-ecule, which has twofold rotation symmetry and is disordered over two positions with a site-occupancy ratio of 0.534?(3):0.466?(3). In the disordered structure, both pyridine rings are essentially planar, with maximum deviations of 0.011?(2) and 0.006?(2)?Å, and these two rings are inclined to one another at a dihedral angle of 79.86?(10)°. In the crystal structure, inter-molecular N-H?O and C-H?O hydrogen bonds link the ions and mol-ecules into a three-dimensional network. The structure is further stabilized by C-H?? inter-actions.

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Two N,N'-bis-(pyridin-4-yl)pyridine-2,6-dicarboxamide coordination compounds.

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N,N'-Bis[4-(trifluoro-meth-yl)phen-yl]pyridine-2,6-dicarboxamide.

Project description:In the title mol-ecule, C(21)H(13)F(6)N(3)O(2), the pyridine ring forms dihedral angles of 1.7?(1) and 5.2?(1)° with the two benzene rings. In the crystal structure, inter-molecular N-H?O hydrogen bonds and ??? inter-actions [centroid-centroid distance of 3.628?(3)?Å between aromatic rings] link mol-ecules into stacks along the c axis. The two trifluoro-methyl groups are each rotationally disordered between two orientations, with occupancy ratios of 0.58?(1):0.42?(1) and 0.55?(1):0.45?(1).

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Ethyl 1-(2-bromo-propano-yl)-4-hydr-oxy-2,6-diphenyl-1,2,5,6-tetra-hydro-pyridine-3-carboxylate.

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