title: Two hydration products of 3,4,5,6-tetrachloro-N-(methyl-2-pyridyl)phthalmic acids.
abstract: In 2-amino-6-methylpyridin-1-ium 2-carboxy-3,4,5,6-tetrachlorobenzoate, C(6)H(9)N(2)(+)·C(8)HCl(4)O(4)(-), there are two perpendicular chains of hydrogen-bonded ions, one arising from the interaction between 2-carboxy-3,4,5,6-tetrachlorobenzoate ions and the other from the interaction between the 2-amino-6-methylpyridin-1-ium and 2-carboxy-3,4,5,6-tetrachlorobenzoate ions. These chains combine to form a two-dimensional network of hydrogen-bonded ions. Cocrystals of bis(2-amino-3-methylpyridin-1-ium) 3,4,5,6-tetrachlorophthalate-3,4,5,6-tetrachlorophthalic acid (1/1), 2C(6)H(9)N(2)(+)·C(8)Cl(4)O(4)(2-)·C(8)H(2)Cl(4)O(4), form finite aggregates of hydrogen-bonded ions. π-π interactions are observed between 2-amino-3-methylpyridin-1-ium cations. Both structures exhibit the characteristic R(2)(2)(8) motif as a result of the hydrogen bonding between the 2-aminopyridinium and carboxylate units.
authors: Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, England.
authors: Paul G
authors: PG
authors: Waddell
authors: Jeremy O S
authors: JO
authors: Hulse
authors: Jacqueline M
authors: JM
authors: Cole
mesh_terms: D001565:Benzoates / Q000737:chemistry*; D002723:Chlorobenzoates; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D010795:Phthalic Acids / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D011726:Pyridinium Compounds / Q000737:chemistry*
chemical_list: C561912:2-amino-6-methylpyridin-1-ium 2-carboxy-3,4,5,6-tetrachlorobenzoate; C561911:3,4,5,6-tetrachloro-N-(methyl-2-pyridyl)phthalmic acid; D001565:Benzoates; D002723:Chlorobenzoates; D010795:Phthalic Acids; D011725:Pyridines; D011726:Pyridinium Compounds