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Hexane-1,6-diammonium dinitrate.

ABSTRACT: The hexane-1,6-diammonium cation of the title compound, C(6)H(18)N(2) (2+)·2NO(3) (-), lies across a crystallographic inversion centre and shows significant deviation from planarity in the hydro-carbon chain. This is evident from the torsion angle of -64.0°(2) along the N-C-C-C bond and thse torsion angle of -67.1°(2) along the C-C-C-C bonds. An intricate three-dimensional hydrogen-bonding network exists in the crystal structure, with each H atom on the ammonium group exhibiting bifurcated inter-actions to the nitrate anion. Complex hydrogen-bonded ring and chain motifs are also evident, in particular a 26-membered ring with graph-set notation R(4) (4)(26) is observed.

SUBMITTER: van Blerk C

PROVIDER: S-EPMC2977696 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature

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Hexane-1,6-diammonium dinitrate.

van Blerk Charmaine C Kruger Gert J GJ

Acta crystallographica. Section E, Structure reports online 20090408 Pt 5

The hexane-1,6-diammonium cation of the title compound, C(6)H(18)N(2) (2+)·2NO(3) (-), lies across a crystallographic inversion centre and shows significant deviation from planarity in the hydro-carbon chain. This is evident from the torsion angle of -64.0°(2) along the N-C-C-C bond and thse torsion angle of -67.1°(2) along the C-C-C-C bonds. An intricate three-dimensional hydrogen-bonding network exists in the crystal structure, with each H atom on the ammonium group exhibiting bifurcated inter ...[more]

PMID: 21583832

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Hexane-1,6-diammonium bis-(pyridine-2-carboxyl-ate).

Project description:The title compound, C(6)H(18)N(2) (2+)·2C(6)H(4)NO(2) (-), consists of a doubly protonated hexa-methyl-enediammonium dication and two pyridine-2-carboxyl-ate anions. These ions inter-act by means of inter-molecular N-H⋯O and N-H⋯N hydrogen bonds to form a two-dimensional array. The carboxyl-ate groups of the anions appear to be delocalized on the basis of the C-O bond lengths.

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Redetermination of trans-cyclo-hexane-1,4-diammonium dichloride.

Project description:A redetermination of the crystal structure of the title compound, C(6)H(16)N(2) (2+)·2Cl(-), was undertaken. All atomic coordinates including those of the H atoms were refined freely. The cation is located on a centre of symmetry. Important for the crystal structure are wavy hydrogen-bonded layers that are formed by ammonium groups and chloride anions, giving hydrogen-bonded rings.

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Cyclo-hexane-1,2-diammonium bis-(pyridine-2-carboxyl-ate).

Project description:In the dication of the title salt, C(6)H(16)N(2) (2+)·2C(6)H(4)NO(2) (-), the two ammonium groups are in the equatorial positions of the chair-shaped cyclo-hexyl ring. In the crystal, the cations and anions are linked by N-H?O and N-H?N hydrogen bonds, forming a layer network parallel to the ac plane. Weak ?-? inter-actions between adjacent pyridine rings with a centroid-centroid distance of 3.589?(2)?Å are also present.

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4,4'-(Hexane-1,6-diyldi-oxy)dianiline.

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2,2'-(Hexane-1,6-di-yl)diisoquinolinium tetra-chloridozincate(II).

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1,1'-(Hexane-1,6-di-yl)dipyridinium bis-(hexa-fluoro-phosphate).

Project description:The asymmetric unit of the title compound, C(16)H(22)N(2) (2+)·2PF(6) (-), contains one half-mol-ecule and a hexa-fluoro-phosphate anion. In the crystal structure, inter-molecular C-H⋯F hydrogen bonds link the mol-ecules. The F atoms in the hexa-fluoro-phosphate anion are disordered over two positions and were refined with occupancies of 0.43 (2) and 0.57 (2).

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1,1'-[(Hexane-1,6-diyldi-oxy)bis-(nitrilo-methyl-idyne)]dinaphthalene.

Project description:The title compound, C(28)H(28)N(2)O(2), was synthesized by condensation of 1-naphthaldehyde with 1,6-bis-(amino-oxy)hexane in ethanol. The mol-ecule is disposed about a crystallographic centre of symmetry. In the crystal structure, mol-ecules are linked through strong inter-molecular π-π stacking inter-actions [interplana distance = 2.986 (2) Å], forming a three-dimensional network.

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Project description:The title compound, C(24)H(32)N(2)O(4), is a polydentate Schiff base and reveals strong intra-molecular O-H?N hydrogen bonding between the hy-droxy O atom and the imino N atom, with an O?N distance of 2.570?(3)?Å. In the crystal, a centre of inversion is located at the mid-point of the compound. The diimino-hexyl-ene chain is almost ideally in the anti conformation, with an average dihedral angle of 179.0°.

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