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4-Meth-oxy-benzamidinium hydrogen oxalate monohydrate.

ABSTRACT: The title hydrated salt, C8H11N2O(+)·C2HO4(-)·H2O, was synthesized by a reaction of 4-meth-oxy-benzamidine (4-amidino-anisole) and oxalic acid in water solution. In the cation, the amidinium group forms a dihedral angle of 15.60 (6)° with the mean plane of the benzene ring. In the crystal, each amidinium unit is bound to three acetate anions and one water mol-ecule by six distinct N-H⋯O hydrogen bonds. The ion pairs of the asymmetric unit are joined by two N-H⋯O hydrogen bonds into ionic dimers in which the carbonyl O atom of the semi-oxalate anion acts as a bifurcated acceptor, thus generating an R(1)2(6) motif. These subunits are then joined through the remaining N-H⋯O hydrogen bonds to adjacent semi-oxalate anions into linear tetra-meric chains running approximately along the b axis. The structure is stabilized by N-H⋯O and O-H⋯O inter-molecular hydrogen bonds. The water mol-ecule plays an important role in the cohesion and the stability of the crystal structure being involved in three hydrogen bonds connecting two semi-oxalate anions as donor and a benzamidinium cation as acceptor.

SUBMITTER: Irrera S

PROVIDER: S-EPMC3588951 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4-Meth-oxy-benzamidinium chloride monohydrate.

Project description:In the cation of the title compound, C(8)H(11)N(2)O(+)·Cl(-)·H(2)O, the C-N bonds of the amidinium group are identical within experiemental error [1.305?(2) and 1.304?(2)?Å], and its plane forms a dihedral angle of 25.83?(8)° with the phenyl ring. The ionic components are associated in the crystal into polymeric hydrogen-bonded supra-molecular tapes stabilized by N-H(+)?Cl(-) and N-H(+)?Ow inter-molecular hydrogen bonds, and by Ow-H?Cl(-) inter-actions.

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Project description:The title salt, C(8)H(11)N(2)O(+)·HSO(4) (-), has been synthesized by the reaction between 4-meth-oxy-benzamidine and sulfuric acid. The asymmetric unit comprises a nonplanar 4-meth-oxy-benzamidinium cation and one hydrogen sulfate anion. In the cation, the amidinium group has two identical C-N bonds [1.306?(2) and 1.308?(2)?Å], and its plane forms a dihedral angle of 6.49?(8)° with the mean plane of the benzene ring. The ionic components are associated in the crystal via N-H(+)?O(-), resulting in chains running approximately along the b-axis direction whicg are interconnected by O-H?O(-) hydrogen bonds.

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Project description:The title compound, C8H11N2O(+)·CH3CO2(-), was synthesized by a reaction between 4-meth-oxy-benzamidine (4-amidino-anisole) and acetic acid. In the cation, the amidinium group forms a dihedral angle of 11.65?(17)° with the mean plane of the benzene ring. The ionic components are associated in the crystal via N-H(+)?O(-) hydrogen bonds, resulting in a one-dimensional structure consisting of dimers and catemers and orientated approximately along the c axis.

| S-EPMC3588825 | biostudies-other

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| S-EPMC2971231 | biostudies-literature

Bis(4-amino-pyridinium) bis(hydrogen oxalate) monohydrate.

Project description:In the title compound, 2C(5)H(7)N(2) (+)·2C(2)HO(4) (-)·H(2)O, the asymmetric unit consists of an amino-pyridinium cation, an oxalic actetate anion and a half-molecule of water, which lies on a two-fold rotation axis. The crystal packing is consolidated by inter-molecular O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds. The mol-ecules are linked into an infinite one dimensional chain along [010].

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Bis(2,6-diamino-pyridinium) bis-(hydrogen oxalate) monohydrate.

Project description:The asymmetric unit of the title compound, 2C(5)H(8)N(3) (+)·2C(2)HO(4) (-)·H(2)O, contains two crystallographically independent 2,6-diamino-pyridinium cations, a pair of hydrogen oxalate anions and a water mol-ecule. Both 2,6-diamino-pyridinium cations are planar, with maximum deviations of 0.011 (2) and 0.015 (1) Å, and are protonated at the pyridine N atoms. The hydrogen oxalate anions adopt twisted conformations and the dihedral angles between the planes of their carboxyl groups are 31.01 (11) and 63.48 (11)°. In the crystal, the cations, anions and water mol-ecules are linked via O-H⋯O and N-H⋯O hydrogen bonds, forming a three-dimensional network.

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