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Bis(2,6-diamino-pyridinium) tartrate monohydrate.

ABSTRACT: In the title compound, 2C(5)H(8)N(3) (+)·C(4)H(4)O(6) (2-)·H(2)O, the two cations are essentially planar [maximum deviations = 0.023?(1) and 0.026?(1)?Å]. In one of the cations, the protonated N atom and one of the amino group H atoms are hydrogen bonded to one of the carboxyl groups of the dianion through a pair of N-H?O hydrogen bonds, forming an R(2) (2)(8) ring motif. In the crystal structure, the tartrate anions and water mol-ecules are linked into chains along the c axis by inter-molecular O-H?O and C-H?O hydrogen bonds. The cations further link the anions and water mol-ecules into a three-dimensional extended structure by a network of N-H?O hydrogen bonds. The crystal structure is also stabilized by weak inter-molecular ?-? inter-actions [centroid-centroid distance = 3.6950?(6)?Å].

SUBMITTER: Al-Dajani MT 

PROVIDER: S-EPMC2971208 | biostudies-other | 2009

REPOSITORIES: biostudies-other

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Bis(2,6-diamino-pyridinium) tartrate monohydrate.

Al-Dajani Mohammad T M MT   Abdallah Hassan H HH   Mohamed Nornisah N   Goh Jia Hao JH   Fun Hoong-Kun HK  

Acta crystallographica. Section E, Structure reports online 20091031 Pt 11

In the title compound, 2C(5)H(8)N(3) (+)·C(4)H(4)O(6) (2-)·H(2)O, the two cations are essentially planar [maximum deviations = 0.023 (1) and 0.026 (1) Å]. In one of the cations, the protonated N atom and one of the amino group H atoms are hydrogen bonded to one of the carboxyl groups of the dianion through a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. In the crystal structure, the tartrate anions and water mol-ecules are linked into chains along the c axis by inter-molecular  ...[more]