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In the title compound, [Er(IN)3(H2O)2] n, where IN is the isonicotinate anion, C6H4NO2−, the asymmetric unit contains one half-mol­ecule. The ErIII atom lies on a crystallographic twofold axis and is coordinated by four and two carboxyl­ate O atoms from bridging and chelating isonicotinate groups, respectively, and by two O atoms from water mol­ecules, yielding an eight-coordinate square-anti­prismatic geometry. In the crystal structure, the polymer features an infinite doubly carboxyl­ate-bridged chain-like structure with one chelating carboxyl­ate group on each metal centre. Adjacent chains are, in turn, connected to each other through inter­molecular O—H⋯O and O—H⋯N hydrogen bonds, forming a three-dimensional network. [ABSTRACT FROM AUTHOR]

The title compound, C18H17N3O2·CH4O, is a Schiff base compound, which is derived from the condensation of equimolar amounts of 4-amino­antipyrine and 4-hydroxy­benzaldehyde. In the crystal structure, the MeOH molecules are linked to the Schiff base molecules through intermolecular O—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title compound, [Zn(C13H11N2O)(H2O)](NO3)·H2O, the Zn atom is coordin­ated by two N atoms and one O atom from the Schiff base ligand, and another O atom from a water mol­ecule. The four atoms around the metal constitute a slightly distorted square-planar geometry. The O atoms in both the ions and water mol­ecules contribute to O—H⋯O hydrogen bonds, leading to the formation of sheets parallel to the ac and bc planes. [ABSTRACT FROM AUTHOR]

The title compound, C20H17NO6, was synthesized by the reaction of syringaldehyde with hippuric acid. The molecule adopts a Z configuration about the central olefinic bond. The two benzene rings and the oxazolone ring are almost coplanar. The crystal structure is stabilized by weak intermolecular C—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title compound, C15H15N3O4·H2O, the organic molecule exists in the keto–imine tautomeric form. The benzene ring makes a dihedral angle of 49.9 (2)° with the pyridine ring. The molecules pack in a three-dimensional framework structure by a combination of O—H...O, O—H...N, N—H...O and N—H...N hydrogen bonds. The water molecule of hydration is disordered [ratio of components 0.758 (7):0.242 (7)]. [ABSTRACT FROM AUTHOR]

In the title compound, C24H18F3N3O, the molecule exists in the enamine–keto tautomeric form. The pyrazolone ring makes dihedral angles of 31.8 (2), 45.4 (2) and 71.2 (2)° with the 1-phenyl, aniline and methylene-bound phenyl rings, respectively. An intramolecular N—H...O hydrogen bond helps to stabilize the molecular conformation. [ABSTRACT FROM AUTHOR]

In the title compound, C21H26N2O3, the molecule adopts an E configuration about the central C=N double bond and exists in the phenol–imine tautomeric form. The two benzene rings make a dihedral angle of 38.5 (4)°. Intramolecular O—H...N hydrogen bonding is present. [ABSTRACT FROM AUTHOR]

In the title compound, C16H24N3O10PS2, the thiazolidine ring is approximately planar and the tetrahydropyran ring adopts a chair conformation. The crystal packing is stabilized by intermolecular N—H...O, C—H...S and C—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title compound, C19H19N3O2, the 2-methoxy­phenyl ring is almost coplanar with the pyrazoline ring [dihedral angle 8.7 (4)°], while the phenyl ring forms a dihedral angle of 54.9 (2)° with the pyrazoline ring. [ABSTRACT FROM AUTHOR]

The title compound, C18H15BrClN3O2, was obtained by reacting 3-bromo-5-chloro­salicylic aldehyde and 4-amino­anti­pyrine. The structure displays a trans configuration about the imine C=N double bond. The N atom is also involved in an intra­molecular O—H⋯N hydrogen bond, which stabilizes the configuration. [ABSTRACT FROM AUTHOR]

The crystal structure of the title compound, C18H11ClN2O4, contains intra- and inter­molecular hydrogen bonds that link the ketone and hydroxyl groups. The inter­molecular hydrogen bond results in the formation of a dimer with an R22(12) graph-set motif. [ABSTRACT FROM AUTHOR]