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2-Amino-3-carb-oxy-pyridinium nitrate.

ABSTRACT: In the crystal structure of the title compound, C(6)H(7)N(2)O(2) (+)·NO(3) (-), the cations are linked via C-H?O hydrogen bonds, forming infinite chains running along the b axis. These chains are further linked through N-H?O, O-H?O and C-H?O hydrogen bonds to the nitrate anions, forming well-separated infinite planar layers parallel to (001).

SUBMITTER: Berrah F

PROVIDER: S-EPMC3213504 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature

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2-Amino-3-carb-oxy-pyridinium nitrate.

Berrah Fadila F Bouacida Sofiane S Roisnel Thierry T

Acta crystallographica. Section E, Structure reports online 20110716 Pt 8

In the crystal structure of the title compound, C(6)H(7)N(2)O(2) (+)·NO(3) (-), the cations are linked via C-H⋯O hydrogen bonds, forming infinite chains running along the b axis. These chains are further linked through N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds to the nitrate anions, forming well-separated infinite planar layers parallel to (001). ...[more]

PMID: 22091083

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3-Carb-oxy-pyridinium nitrate.

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4-(3-Carb-oxy-phen-yl)pyridinium nitrate.

Project description:In the title salt, C(12)H(10)NO(2) (+)·NO(3) (-), the dihedral angle between the pyridine ring and the benzene ring of the 4-(3-carb-oxy-phen-yl)pyridinium cation is 30.14 (2)°. Inversion-related pairs of cations are linked into dimers by pairs of O-H⋯O hydrogen bonds. Pairs of dimers are linked by N-H⋯O and C-H⋯O hydrogen bonds involving nitrate anions as acceptors, generating supra-molecular chains along the diagonal of the bc plane.

| S-EPMC3344461 | biostudies-literature

2-Amino-3-carb-oxy-pyridinium perchlorate.

Project description:The asymmetric unit includes two crystallographically independent equivalents of the title salt, C(6)H(7)N(2)O(2) (+)·ClO(4) (-). The cations and anions form separate layers alternating along the c axis, which are linked by N-H?O, O-H?O and C-H?O hydrogen bonds into a two-dimensional network parallel to (100). Further C-H?O contacts connect these layers, forming a three-dimensional network, in which R(4) (4)(20) rings and C(2) (2)(11) infinite chains can be identified.

| S-EPMC3379211 | biostudies-literature

4-Amino-pyridinium 4-carb-oxy-butano-ate.

Project description:The asymmetric unit of the title salt, C(5)H(7)N(2) (+)·C(5)H(7)O(4) (-), contains two 4-amino-pyridinium cations and two 4-carb-oxy-butano-ate anions. Each 4-amino-pyridinium cation is planar, with a maximum deviation of 0.005?(2)?Å. Both 4-carb-oxy-butano-ate anions adopt an extended conformation. In the crystal structure, the cations and anions are linked via N-H?O, O-H?O and C-H?O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.

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2-Amino-3-carb-oxy-pyridinium chloride hemihydrate.

Project description:The asymmetric unit of the title compound, C(6)H(7)N(2)O(2) (+)·Cl(-)·0.5H(2)O, consists of two protonated 2-amino-3-carb-oxy-pyridine cations, two chloride anions and one mol-ecule of water. The crystal packing can be described as alternating layers of cations and anions parallel to (110), which are linked together by O(w)-H?Cl inter-actions. In the crystal, four types of classical hydrogen bonds are observed, viz. cation-anion (O-H?Cl and N-H?Cl), cation-cation (N-H?O), cation-water (N-H?O(w)) and water-anion (O(w)-H?Cl), resulting in the formation of an infinite three-dimensional network.

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2-Amino-4-methyl-pyridinium 2-carb-oxy-benzoate.

Project description:In the title mol-ecular salt, C(6)H(9)N(2) (+)·C(8)H(5)O(4) (-), the anion is stabilized by an intra-molecular O-H?O hydrogen bond, which generates an S(7) ring motif. In the crystal, the cations and anions are linked to form extended chains along [001] by O-H?O and N-H?O hydrogen bonds. Adjacent chains are crosslinked via C-H?O inter-actions into sheets lying parallel to (100).

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2-Amino-5-methyl-pyridinium 2-carb-oxy-acetate.

Project description:In the title mol-ecular salt, C(6)H(9)N(2) (+)·C(3)H(3)O(4) (-), the cation is essentially planar, with a maximum deviation of 0.010?(3)?Å. In the anion, an intra-molecular O-H?O hydrogen bond generates an S(6) ring and results in a folded conformation. In the crystal, the protonated NH group and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms of the anion via a pair of N-H?O hydrogen bonds, forming an R(2) (2)(8) ring motif. Weak inter-molecular C-H?O inter-actions help to further stabilize the crystal structure.

| S-EPMC2979470 | biostudies-literature

2-Amino-5-methyl-pyridinium 2-carb-oxy-benzoate.

Project description:In the title salt, C(6)H(9)N(2) (+)·C(8)H(5)O(4) (-), the hydrogen phthalate anion is essentially planar, with a maximum deviation of 0.011 (2) Å. In the crystal structure, the protonated N atom of the pyridine ring and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms of the anion via a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. In the hydrogen phthalate anion, there is a very strong, almost symmetric, intra-molecular O-H⋯O hydrogen bond, generating an S(7) motif [O⋯O = 2.382 (3) Å]. Furthermore, these two molecular motif rings are connected by a bifurcated N-H⋯(O,O) hydrogen-bonded motif R(1) (2)(4), forming a supra-molecular ribbon along the b axis. The crystal structure is further stabilized by π-π inter-actions between the cations and anions [centroid-centroid distance = 3.6999 (10) Å].

| S-EPMC3008103 | biostudies-literature

2-Amino-5-bromo-pyridinium 2-carb-oxy-benzoate.

Project description:The asymmetric unit of the title compound, C(5)H(6)BrN(2) (+)·C(8)H(5)O(4) (-), consists of two crystallographically independent 2-amino-5-bromo-pyridinium cations (A and B) and two 2-carb-oxy-benzoate anions (A and B). Each 2-amino-5-bromo-pyridinium cation is approximately planar, with a maximum deviation of 0.047 (1) Å in cation A and 0.027 (1) Å in cation B. The 2-amino-5-bromo-pyridinium unit in cation A is inclined at dihedral angles of 4.9 (3) and 2.2 (3)° with the phenyl rings of the A and B 2-carb-oxy-benzoate anions, respectively. The corresponding angles for cation B are 3.0 (3) and 5.6 (3)°. The mol-ecular structure is stabilized by an intra-molecular O-H⋯O hydrogen bond,which generates an S(7) ring motif. The cations and anions are linked via inter-molecular N-H⋯O and C-H⋯O hydrogen bonds, generating R(2) (2)(8) ring motifs. In the crystal packing, mol-ecules are linked into wave-like chains along [001] via adjacent ring motifs. Short inter-molecular distances between the phenyl and pyridine rings [3.613 (4) and 3.641 (4) Å] indicate the existence of π-π inter-actions. The crystal structure is a non-merohedral twin with a contribution of 0.271 (3) of the minor component.

| S-EPMC3008123 | biostudies-literature

4-Amino-pyridinium 5-carb-oxy-penta-noate monohydrate.

Project description:In the title hydrated salt, C(5)H(7)N(2) (+)·C(6)H(9)O(4) (-)·H(2)O, the carb-oxy H atom is disordered over two positions with equal occupancy. In the crystal, O atoms of the 5-carb-oxy-penta-noate anion link the 4-amino-pyridinium cations and water mol-ecules into a three-dimensional network via N-H⋯O hydrogen bonds. The crystal structure is further consolidated by O-H⋯O hydrogen bonds involving the anion and the solvent water mol-ecule.

| S-EPMC3393984 | biostudies-literature

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