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2,4,6-Trimethyl-pyridinium 4-nitro-benzoate-4-nitro-benzoic acid (1/1).

ABSTRACT: The asymmetric unit of the title co-crystal, C(8)H(12)N(+)·C(7)H(4)NO(4) (-)·C(7)H(5)NO(4), contains two cations, two anions and two neutral 4-nitro-benzoic acid mol-ecules. In the crystal, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds connect the ions and mol-ecules, forming a three-dimensional network.

SUBMITTER: Abbasi MA

PROVIDER: S-EPMC3200921 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Pyridinium 3-nitro-benzoate-3-nitro-benzoic acid (1/1).

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Project description:The asymmetric unit of the title compound, C(8)H(12)N(+)·H(2)PO(4) (-), contains two H(2)PO(4) (-) anions and two 2,4,6-trimethyl-pyridinium cations. In the crystal, the anions are linked by O-H?O hydrogen bonds, forming supra-molecular chains running along the a axis; the cations are connected to the anion chains by N-H?O hydrogen bonds. Weak inter-molecular C-H?O hydrogen bonding is also present in the crystal structure.

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Project description:In the title compound, C(5)H(8)N(3) (+)·C(7)H(5)O(2) (-)·C(7)H(6)O(2), the carboxyl and carboxyl-ate groups are twisted away from their attached benzene rings by 10.75?(7) and 20.33?(6)°, respectively. In the crystal structure, the 2,3-diamino-pyridinium cations, benzoate anions and benzoic acid mol-ecules are linked into a two-dimensional network parallel to (001) by O-H?O, N-H?O and C-H?O hydrogen bonds and ?-? inter-actions between the pyridinium rings [centroid-centroid distance = 3.4981?(7)?Å].

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Bis(2,4,6-trimethyl-pyridinium) hexa-chloridoplatinate(IV).

Project description:The asymmetric unit of the title compound, (C(8)H(12)N)(2)[PtCl(6)], contains one independent protonated 2,4,6-trimethyl-pyridinium cation and one half of a centrosymmetric [PtCl(6)](2-) anion. The Pt ion has an almost ideal octa-hedral coordination. In the crystal structure, intra-molecular N-H?Cl and inter-molecular C-H?Cl hydrogen bonds result in the formation of a supra-molecular structure.

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