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Bis-(2-amino-5-methyl-pyridinium) fumarate-fumaric acid (1/1).

ABSTRACT: In the crystal structure of the title compound, C(6)H(9)N(2) (+)·0.5C(4)H(2)O(4) (2-)·0.5C(4)H(6)O(4), the fumarate dianion and fumaric acid mol-ecule are located on inversion centres. The 2-amino-5-methyl-pyrimidinium cation inter-acts with the carboxyl-ate group of the fumarate anion through a pair of N-H?O hydrogen bonds, forming an R(2) (2)(8) ring motif. These motifs are centrosymmetrically paired via N-H?O hydrogen bonds, forming a complementary DDAA array. The carboxyl groups of the fumaric acid mol-ecules and the carboxyl-ate groups of the fumarate anions are hydrogen bonded through O-H?O hydrogen bonds, leading to a supra-molecular chain along [101]. The crystal structure is further stabilized by weak C-H?O hydrogen bonds.

SUBMITTER: Hemamalini M

PROVIDER: S-EPMC3007292 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature

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Bis-(2-amino-5-methyl-pyridinium) fumarate-fumaric acid (1/1).

Hemamalini Madhukar M Fun Hoong-Kun HK

Acta crystallographica. Section E, Structure reports online 20100724 Pt 8

In the crystal structure of the title compound, C(6)H(9)N(2) (+)·0.5C(4)H(2)O(4) (2-)·0.5C(4)H(6)O(4), the fumarate dianion and fumaric acid mol-ecule are located on inversion centres. The 2-amino-5-methyl-pyrimidinium cation inter-acts with the carboxyl-ate group of the fumarate anion through a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. These motifs are centrosymmetrically paired via N-H⋯O hydrogen bonds, forming a complementary DDAA array. The carboxyl groups of the fumar ...[more]

PMID: 21588388

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