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The title compound, C11H17NO6, was prepared by the reaction of 1-aminocyclohexanecarboxylic acid with monochloroacetic acid. In the molecule one of three carboxy groups is deprotonated while the N atom is protonated, thus the molecule exists as an inner salt in the crystal structure. The crystal packing is stabilized by intermolecular O—H⋯O hydrogen bonding; an intramolecular N—H⋯O hydrogen bond is also present. [ABSTRACT FROM AUTHOR]

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, C20H19N3O, is a Schiff base compound derived from 4-amino­antipyrine and cinnam­aldehyde. As expected, the molecular structure adopts a trans configuration about the central C=N double bond. [ABSTRACT FROM AUTHOR]

In the title mol­ecule, C18H16N4O3, the substituted p-nitrophenyl ring is almost coplanar with the pyrazoline ring [dihedral angle = 8.2 (4)°], whereas the phenyl ring directly attached to the pyrazoline ring forms a dihedral angle of 54.5 (2)°. [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]

A form ofdl-aspartic acid, C4H7NO4 is presented, which crystallizes in the same space group as the previously reported form but with a slightly different a axis. Its structure exhibits a three-dimensional supramolecular network of N—H...O and O—H...O bonds, which stabilizes the crystal packing. [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, C18H16N4O3, has been synthesized by the reaction of 2-nitro­benzaldehyde and 4-amino­anti­pyrine. The mol­ecule adopts an E configuration about the central C=N double bond. [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]