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The quinoline ring system of the title salt, C11H12NO+·HSO4−, is essentially planar, with a maximum deviation of 0.054 (2) Å for all non H atoms. In the crystal, the cations and anions are linked via N—HO, O—HO and weak C—HO hydrogen bonds, and are stacked respectively in columns along the a axis. π–π stacking interactions, with centroid–centroid distances of 3.5473 (12) and 3.6926 (12) Å, are also observed. The crystal studied was an inversion twin with refined components of 0.43 (7):0.57 (7).
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In the title hydrated salt, C11H12NO+·Cl−·2H2O, the quinoline ring system is essentially planar, with a maximum deviation of 0.005 (1) Å for all non-H atoms. In the crystal, the three components are linked by O—HO, N—HO, O—HCl and weak C—HO hydrogen bonds, forming a layer structure parallel to the ac plane. The crystal structure is further stabilized by π–π stacking interactions, with centroid–centroid distances of 3.5213 (6) and 3.7176 (6) Å.
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In the title molecular salt, C5H8N3+·C3H3O4−, the cation is essentially planar, with a maximum deviation of 0.005 (1) Å for all non-H atoms. In the anion, an intramolecular O—HO hydrogen bond generates an S(6) ring. In the crystal, the cations and anions are connected via N—HO hydrogen bonds and a weak C—HO interaction, forming layers parallel to the ab plane.
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The 4-methylbenzoate anion of the title salt, C6H9N2+·C8H7O2−, is nearly planar, with a dihedral angle of 6.26 (10)° between the benzene ring and the carboxylate group. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N—HO hydrogen bonds with an R22(8) ring motif, forming an approximately planar ion pair with a dihedral angle of 9.63 (4)° between the pyridinium and benzene rings. The ion pairs are further connected via N—HO and weak C—HO hydrogen bonds, forming a two-dimensional network parallel to the bc plane.
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In the 5-chlorosalicylate anion of the title salt, C6H9N2+·C7H4ClO3−, an intramolecular O—HO hydrogen bond with an S(6) graph-set motif is observed and the dihedral angle between the benzene ring and the –CO2 group is 1.6 (6)°. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms via a pair of N—HO hydrogen bonds, forming an R22(8) ring motif. The crystal structure also features N—HO and weak C—HO interactions, resulting in a layer parallel to (10-1).
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The 4-chlorobenzoate anion of the title salt, C6H9N2+·C7H4ClO2−, is nearly planar with a dihedral angle of 5.14 (16)° between the benzene ring and the carboxylate group. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N—HO hydrogen bonds with an R22(8) ring motif. The ion pairs are further connected via N—HO and weak C—HO hydrogen bonds, forming a two-dimensional network parallel to the bc plane. The crystal structure also features a π–π stacking interaction between the pyridinium and benzene rings with a centroid–centroid distance of 3.7948 (9) Å.
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In the title salt, C6H9N2+·C7H4ClO2−, the 3-chlorobenzoate anion shows a whole-molecule disorder over two positions with a refined occupancy ratio of 0.505 (4):0.495 (4). In the crystal, the cations and anions are linked via N—HO hydrogen bonds, forming a centrosymmetric 2 + 2 aggregate with R22(8) and R42(8) ring motifs. The crystal structure also features a π–π stacking interaction between the pyridinium rings with a centroid–centroid distance of 3.8339 (9) Å.
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The asymmetric unit of the title compound, 2C10H11N2+·2C3H3O4−·C3H4O4, consists of one 5-amino-6-methylquinolin-1-ium cation, one hydrogen malonate (2-carboxyacetate) anion and one-half molecule of malonic acid which lies on a twofold rotation axis. The quinoline ring system is essentially planar, with a maximum deviation of 0.062 (2) Å for all non-H atoms. In the anion, an intramolecular O—HO hydrogen bond generates an S(6) ring. In the crystal, the components are linked via N—HO and O—HO hydrogen bonds into layers parallel to the ac plane. The crystal structure also features weak C—HO hydrogen bonds and a π–π stacking interaction with a centroid–centroid distance of 3.8189 (10) Å.
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In the 5-chlorosalicylate anion of the title salt, C5H6BrN2+·C7H4ClO3−, an intramolecular O—HO hydrogen bond with an S(6) graph-set motif is formed, so that the anion is essentially planar with a dihedral angle of 1.3 (5)° between the benzene ring and the carboxylate group. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms via a pair of N—HO hydrogen bonds, forming an R22(8) ring motif. The crystal structure also features N—HO and weak C—HO interactions, resulting in a layer parallel to the (10-1) plane.
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The asymmetric unit of the title salt, C10H11N2+·C4H5O4−, consists of two independent 5-amino-6-methylquinolin-1-ium cations and two 3-carboxypropanoate anions. Both cations are protonated at the pyridine N atoms and are essentially planar, with maximum deviations of 0.026 (3) and 0.016 (2) Å. In the crystal, the cations and anions are linked via N—HO and O—HO hydrogen bonds, forming a layer parallel to the ab plane. In the layer, weak C—HO hydrogen bonds and π–π stacking interactions, with centroid-to-centroid distances of 3.7283 (15) and 3.8467 (15) Å, are observed. The crystal structure also features weak C—HO hydrogen bonds between the layers.
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In the title compound, C25H26N2OS, the diethyl-substituted benzene ring forms dihedral angles of 67.38 (9) and 55.32 (9)° with the terminal benzene rings. The molecule adopts a trans–cis conformation with respect to the orientations of the diphenylmethane and 1,3-diethylbenzene groups with respect to the S atom across the C—N bonds. This conformation is stabilized by an intramolecular N—HO hydrogen bond, which generates an S(6) ring. In the crystal, pairs of N—HS hydrogen bonds link the molecules into inversion dimers, forming R22(6) loops. The dimer linkage is reinforced by a pair of C—HS hydrogen bonds, which generate R22(8) loops. Weak C—Hπ and π–π [centroid–centroid seperation = 3.8821 (10) Å] interactions also occur in the crystal structure.
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The 4-methylbenzoic acid molecule of the title adduct, C10H11N5·C8H8O2, is approximately planar with a dihedral angle of 6.3 (2)° between the carboxylic acid group and the benzene ring. In the triazine molecule, the plane of the triazine ring makes a dihedral angle of 29.2 (2)° with that of the adjacent benzene ring. In the crystal, the acid and base molecules are linked via N—HO and O—HN hydrogen bonds with an R22(8) motif, and the acid–base pairs are further connected via N—HN hydrogen bonds with R22(8) motifs, forming a supramolecular ribbon along [101]. Between the tapes, a weak C—Hπ interaction is observed.
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In the title molecule, C23H22N2OS, the diphenylacetyl and ethylbenzene groups adopt a trans–cis conformation, respectively, with respect to the S atom across the (S=)C—N bonds. This conformation is stabilized by an intramolecular N—HO hydrogen bond and a weak C—HS hydrogen bond. The ethyl-substituted benzene ring forms dihedral angles of 87.53 (15) and 73.94 (15)° with the phenyl rings. In the crystal, N—HO hydrogen bonds link molecules into chains along [100]. A weak C—Hπ interaction is also observed.
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In the 3-hydroxypicolinate anion of the title salt, C6H9N2+·C6H4NO3−, an intramolecular O—HO hydrogen bond with an S(6) graph-set motif is formed, so that the anion is essentially planar, with a dihedral angle of 9.55 (9)° between the pyridine ring and the carboxylate group. In the crystal, the cations and anions are linked via N—HO hydrogen bonds, forming a centrosymmetric 2 + 2 aggregate with R22(8) and R42(8) ring motifs. The crystal structure also features N—HN and weak C—Hπ interactions.
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In the title salt, C6H9N2+·C7H5O3−, the anion is essentially planar, with a dihedral angle of 2.72 (17)° between the benzene ring and the carboxylate group. In the crystal, the anions are connected by O—HO hydrogen bonds, forming a 41 helical chain along the c axis. The protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N—HO hydrogen bonds with an R22(8) ring motif. The ion pairs are further connected via another N—HO hydrogen bond, resulting in a three-dimensional network.
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The title molecule, C22H17F3N2OS, adopts a trans–cis conformation with respect to the positions of the carbonyl and trifluoromethylbenzene groups against the thiocarbonyl group across the C—N bonds. The molecular structure is stabilized by an intramolecular N—HO hydrogen bond with an S(6) ring motif. The trifluoromethyl-substituted benzene ring forms dihedral angles of 66.05 (9) and 47.19 (9)° with the terminal phenyl rings and is twisted from the O=C—N—(C=S)—N carbonylthiourea plane [maximum deviation = 0.0535 (12) Å], making a dihedral angle of 63.59 (8)°. In the crystal, N—HO and C—HF hydrogen bonds link the molecules into a layer parallel to the bc plane. A C—Hπ interaction is also observed.