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In the title compound, C16H19N3O5S, the dihedral angle between the benzene ring and the carbonylamino group is 18.18 (2)°. In the crystal, molecules form centrosymmetric dimers via pairs of N—H
N hydrogen bonds. The dimers are connected via N—HO hydrogen bonds into a three-dimensional network..
N hydrogen bonds. The dimers are connected via N—HO hydrogen bonds into a three-dimensional network..metal-organic compoundsOpen access
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In the title coordination polymer, [Cd(C8H5N2O2S)2(C10H8N2)]n, the CdII ion is coordinated by a bidentate 2,2-bipyridyl ligand, two O,O′-chelating 2-amino-1,3-benzothiazole-6-carboxylate (ABTC) ligands and one N-bonded ABTC ligand. The resulting CdN3O4 coordination polyhedron approximates to a very distorted pentagonal bipramid with one O and one N atom in axial positions. One of the ABTC ligands is bridging to an adjacent metal atom, generating an infinite chain propagating in [100]. A three-dimensional network is constructed from N—HO and N—HN hydrogen bonds and aromatic π–π stacking interactions [centroid–centroid separations = 3.641 (2) and 3.682 (3) Å].
O and N—HN hydrogen bonds and aromatic π–π stacking interactions [centroid–centroid separations = 3.641 (2) and 3.682 (3) Å].organic compoundsOpen access
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In the zwitterionic title compound, C17H11NO5, the dihedral angle between the two aromatic rings is 76.90 (7)°. The dihedral angles between the carboxyl groups and the benzene ring are 64.02 (9) and 21.67 (9)°, the larger angle being associated with an intramolecular N—HOcarboxyl hydrogen bond, resulting from proton transfer from the carboxylic acid group to the quinoline N atom and giving an S(9) ring motif. In the crystal, molecules are connected by O—HO hydrogen bonds into chains extending along the b-axis direction. An overall two-dimensional network structure is formed through π–π interactions between the quinoline rings [minimum ring-centroid separation = 3.6068 (6) Å].
Ocarboxyl hydrogen bond, resulting from proton transfer from the carboxylic acid group to the quinoline N atom and giving an S(9) ring motif. In the crystal, molecules are connected by O—HO hydrogen bonds into chains extending along the b-axis direction. An overall two-dimensional network structure is formed through π–π interactions between the quinoline rings [minimum ring-centroid separation = 3.6068 (6) Å].organic compoundsOpen access
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In the title compound, C19H22N2O4, the dihedral angle between the aromatic rings is 67.33 (2)°. In the crystal, molecules are linked through N—HO and O—HO hydrogen bonds, generating a two-dimensional network lying parallel to (100). As a result of the twist of the molecular skeleton and the hindrance of the tert-butyl groups, no π–π interactions exist between the aromatic rings.
O and O—HO hydrogen bonds, generating a two-dimensional network lying parallel to (100). As a result of the twist of the molecular skeleton and the hindrance of the tert-butyl groups, no π–π interactions exist between the aromatic rings. 
