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4-Amino-pyridinium 2-chloro-4-nitro-benzoate monohydrate.

ABSTRACT: In the title hydrated mol-ecular salt, C5H7N2(+)·C7H3ClNO4(-)·H2O, the ions and water mol-ecules assemble into ribbons of R6(5)(22) rings along the c axis via O(water)-H⋯O(-), N(+)-H⋯O(water) and N-H⋯O(-) hydrogen bonds. N-H⋯O(-) hydrogen bonds connect adjacent ribbons along the c-axis direction via R4(4)(12) rings, forming hydrogen-bonded layers. The CO2 and NO2 groups make dihedral angles of 81.8 (2) and 1.4 (2)°, respectively, with the ring in the anion.

SUBMITTER: Savig KL

PROVIDER: S-EPMC3588959 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-Amino-5-chloro-pyridinium 4-amino-benzoate.

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2-Amino-5-nitro-pyridinium tetraoxido-rhenate(VII) monohydrate.

Project description:All the residues of the title compound, (C(5)H(6)N(3)O(2))[ReO(4)]·H(2)O, are located on general crystallographic positions. The 2-amino-5-nitro-pyridinium cation has a typical planar conformation with one of the nitro O atoms -0.058 (5) Å out of plane; the amine H atoms are also a little out of the main ring plane towards the opposite side of the aforementioned O atom [by 0.02 (4) and 0.04 (4) Å]. The perrhenate anion is nearly ideally tetra-hedral. Three distinct N-H⋯O hydrogen bonds give rise to C(8) zigzag chains running along [100]. R(4) (4)(12) rings involving the two hydrogen bonds in which the water mol-ecules inter-act with the perrhenate anions are also present.

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