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2-Amino-5-methyl-pyridinium 4-carb-oxy-butano-ate.

ABSTRACT: In the title salt, C(6)H(9)N(2) (+)·C(5)H(7)O(4) (-), the 2-amino-5-methyl-pyridinium cation is essentially planar, with a maximum deviation of 0.008?(1)?Å. In the crystal, the protonated N atom and the 2-amino group are hydrogen bonded to the carboxyl-ate O atoms via a pair of N-H?O hydrogen bonds, forming an R(2) (2)(8) ring motif. The 4-carb-oxy-butano-ate anions are linked via O-H?O hydrogen bonds. The crystal structure is further stabilized by weak C-H?O inter-actions.

SUBMITTER: Hemamalini M

PROVIDER: S-EPMC3006734 | biostudies-literature | 2010 Jun

REPOSITORIES: biostudies-literature

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2-Amino-5-methyl-pyridinium 4-carb-oxy-butano-ate.

Hemamalini Madhukar M Fun Hoong-Kun HK

Acta crystallographica. Section E, Structure reports online 20100626 Pt 7

In the title salt, C(6)H(9)N(2) (+)·C(5)H(7)O(4) (-), the 2-amino-5-methyl-pyridinium cation is essentially planar, with a maximum deviation of 0.008 (1) Å. In the crystal, the protonated N atom and the 2-amino group are hydrogen bonded to the carboxyl-ate O atoms via a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. The 4-carb-oxy-butano-ate anions are linked via O-H⋯O hydrogen bonds. The crystal structure is further stabilized by weak C-H⋯O inter-actions. ...[more]

PMID: 21588042

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

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2-Amino-4-methyl-pyridinium 6-carb-oxy-pyridine-2-carboxyl-ate methanol monosolvate.

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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 ?-? inter-actions between the cations and anions [centroid-centroid distance = 3.6999?(10)?Å].

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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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