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2-Amino-5-bromo-pyridinium trifluoro-acetate.

ABSTRACT: In the title compound, C(5)H(6)BrN(2) (+)·C(2)F(3)O(2) (-), the F atoms of the anion are disordered over two sets of sites, with occupancies of 0.59 (2):0.41 (2). In the crystal structure, the anions and cations are linked into a two-dimensional network parallel to (100) by N-H⋯O and C-H⋯O hydrogen bonds. Within this network, the N-H⋯O hydrogen bonds generate R(2) (2)(8) ring motifs.

SUBMITTER: Hemamalini M

PROVIDER: S-EPMC2983956 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-Amino-pyridinium trifluoro-acetate.

Project description:The asymmetric unit of the title compound, C(5)H(7)N(2) (+)·C(2)F(3)O(2) (-), contains four independent 2-amino-pyridinium cations and four independent trifluoro-acetate anions. In the crystal structure, these ions are linked by N-H?O hydrogen bonds, forming four cation-anion pairs each containing an R(2) (2)(8) ring motif. The ion pairs are linked into two independent chains along [100] by N-H?O hydrogen bonds. In addition, C-H?O and C-H?F hydrogen bonds and ??? inter-actions [centoid-centroid separation = 3.6007?(17)?Å] are observed.

| S-EPMC2983566 | biostudies-literature

2-Amino-4-methyl-pyridinium trifluoro-acetate.

Project description:The asymmetric unit of the title compound, C(6)H(9)N(2) (+)·C(2)F(3)O(2) (-), contains two independent 2-amino-4-methyl-pyridinium cations and two independent trifluoro-acetate anions. The F atoms of both anions are disordered over two sets of sites, with site occupancies of 0.50?(3) and 0.50?(3) in one of the anions, and 0.756?(9) and 0.244?(9) in the other. In the crystal, the cations and anions are linked into chains along the b axis by N-H?O hydrogen bonds and these chains are cross-linked by C-H?O hydrogen bonds, forming a two-dimensional network lying parallel to (101). The crystal structure is further stabilized by ?-? inter-actions between the pyridinium rings [centroid-centroid distances = 3.5842?(13) and 3.5665?(16)?Å].

| S-EPMC2984062 | biostudies-literature

2-Amino-5-methyl-pyridinium trifluoro-acetate.

Project description:In the title salt, C6H9N2(+)·C2F3O2(-), the F atoms of the anion are disordered over two sets of sites, with refined occupancies in a ratio of 0.505 (17):0.495 (17). In the crystal, cations and anions are linked via N-H⋯O hydrogen bonds, forming R2(2)(8) ring motifs. The ionic units are linked into a two-dimensional network parallel to (100) by N-H⋯O and weak C-H⋯O hydrogen bonds. The crystal structure is further stabilized by weak C-H⋯F hydrogen bonds, resulting in a three-dimensional network.

| S-EPMC3588927 | biostudies-literature

2-Amino-5-chloro-pyridinium trifluoro-acetate.

Project description:The asymmetric unit of the title salt, C(5)H(6)ClN(2) (+)·C(2)F(3)O(2) (-), contains two independent 2-amino-5-chloro-pyridinium cations and two independent trifluoro-acetate anions. The F atoms of both anions are disordered over two sets of positions, with occupancy ratios of 0.672 (12):0.328 (12) and 0.587 (15):0.413 (15). In the crystal, the cations and anions are linked via N-H⋯O and C-H⋯O hydrogen bonds, forming a two-dimensional network parallel to (001).

| S-EPMC2983973 | biostudies-literature

2-Amino-4-methyl-pyridinium trifluoro-acetate: a monoclinic polymorph.

Project description:The title salt, C(6)H(9)N(2) (+)·C(2)F(3)O(2) (-), is a monoclinic polymorph of a previously reported structure [Hemamalini & Fun (2010). Acta Cryst. E66, o781-o782]. In the crystal structure, the cations and anions are linked by two different types of N-H⋯O hydrogen bonds, forming cation-anion pairs. These pairs are hydrogen bonded to neighbouring pairs via another N-H⋯O hydrogen bonds involving an H atom of the NH(2) group and one of the O atoms of the COO(-) group into a chain extended along the b axis.

| S-EPMC2983996 | biostudies-literature

4-(4-Nitro-benzene-sulfonamido)pyridinium trifluoro-acetate.

Project description:In the title compound, C(11)H(10)N(3)O(4)S(+)·C(2)F(3)O(2) (-), the benzene ring makes an angle of 87.3?(2)° with the pyridinium ring. The nitro group is essentially coplanar with the benzene ring. The F atoms of the CF(3) group are disordered over two positions with almost equal occupancy [0.531?(12)/0.469?(12)]. The crystal structure is stabilized by N-H?O and C-H?O hydrogen bonds.

| S-EPMC2962139 | biostudies-literature

3-(2H-Tetra-zol-5-yl)pyridinium trifluoro-acetate.

Project description:In the cation of the title compound, C(6)H(6)N(5) (+)·CF(3)COO(-), the pyridine and tetra-zole rings are nearly coplanar, making a dihedral angle of 2.49?(19)°. In the crystal, the cations and anions are connected by inter-molecular N-H?O and N-H?(F,O) hydrogen bonds, forming centrosymmetric [2 + 2] aggregates, which stack along the a axis.

| S-EPMC2970170 | biostudies-literature

2-Amino-5-bromo-pyridinium 3-amino-benzoate.

Project description:In the title salt, C(5)H(6)BrN(2) (+)·C(7)H(6)NO(2) (-), the pyridine N atom of the 2-amino-5-bromo-pyridine mol-ecule is protonated. In the crystal, the protonated N atom and the 2-amino group are hydrogen-bonded to the carboxyl-ate O atoms via a pair of N-H?O hydrogen bonds, forming an R(2) (2)(8) ring motif. Two inversion-related 3-amino-benzoate anions are linked through N-H?O hydrogen-bonds, forming an R(2) (2)(14) ring motif. The crystal structure is further stabilized by ??? inter-actions involving the benzene and pyridinium rings with a centroid-centroid distance of 3.7743?(15)?Å.

| S-EPMC2983620 | biostudies-literature

2-Amino-5-bromo-pyridinium hydrogen succinate.

Project description:In the title compound, C(5)H(6)BrN(2) (+)·C(4)H(5)O(4) (-), the pyridine N atom of the 2-amino-5-bromo-pyridine mol-ecule is protonated. The protonated N atom and the amino group are linked via N-H?O hydrogen bonds to the carboxyl-ate O atoms of the singly deprotonated succinate anion. The hydrogen succinate anions are linked via O-H?O hydrogen bonds. A weak inter-molecular C-H?O hydrogen bond is also observed.

| S-EPMC2983627 | biostudies-literature

Bis(2-amino-5-bromo-pyridinium) fumarate dihydrate.

Project description:In the title compound, 2C(5)H(6)BrN(2) (+)·C(4)H(2)O(4) (2-)·2H(2)O, the complete fumarate dianion is generated by crystallographic inversion symmetry. The cation is approximately planar, with a maximum deviation of 0.036 (1) Å. In the anion, the carboxyl-ate group is twisted slightly away from the attached plane; the dihedral angle between carboxyl-ate and (E)-but-2-ene planes is 6.11 (14)°. In the crystal, the carboxyl-ate O atoms form bifurcated (N-H⋯O and C-H⋯O) and N-H⋯O hydrogen bonds with the cations. The crystal packing is stabilized by R(2) (2)(8) ring motifs which are generated by pairs of N-H⋯O hydrogen bonds. The crystal structure is further consolidated by water mol-ecules via O(water)-H⋯O and N-H⋯O(water) hydrogen bonds. The components are linked by these inter-actions into three-dimensional network.

| S-EPMC3007988 | biostudies-literature

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