organic compounds
Open access
In the title compound, C2H5NO2·C8H6O4, the glycine molecule exists as a zwitterion (2-azaniumylethanoate) with a positively charged amino group and a negatively charged carboxylate group. In the crystal, N—HO and O—HO hydrogen bonds link the components into layers parallel to the ab plane. The central part of each layer is composed of hydrogen-bonded glycine zwitterions, while phthalic acid molecules interact with the zwitterions in such a way that benzene rings protrude up and down from the layer.
metal-organic compounds
Open access
In the title coordination polymer, {[Li(C2H5NO2)2(H2O)]Br}n, the Li+ cation is coordinated by three carboxylate O atoms of zwitterionic glycine molecules and by a water molecule, forming a distorted tetrahedral geometry. One of the two glycine molecules bridges neighbouring complexes, forming an infinite chain parallel to the c axis. Polymeric chains are further linked by extensive hydrogen bonds involving the Br− anions and glycine and water molecules, producing a three-dimensional network.
organic compounds
Open access
In the crystal of the title hydrated molecular salt, C8H12NO+·Cl−·H2O, the water molecule makes two O—HCl hydrogen bonds, generating [010] zigzag chains of alternating water molecules and chloride ions. The cation is bonded to the chain by an O—HO hydrogen bond and two weak C—HCl interactions. Weak aromatic π–π stacking [centroid–centroid separation = 3.5175 (15) Å] occurs between the chains.
organic compounds
Open access
In the cation of the title salt, C8H11N2+·Br−, the dihedral angle between the planes of the pyridinium ring and the allyl group is 79.4 (3)°. In the crystal, N—HBr and weak C—HBr hydrogen bonds link the cations and anions, forming chains of alternating R21(7) and R42(8) rings, which run parallel to the c-axis direction. The crystal studied was an inversion twin with components in a 0.753 (12):0.247 (12) ratio.
organic compounds
Open access
The title salt, C8H12NO+·Br−·H2O, is isomorphous with the chloride analogue [Seethalakshmi et al. (2013). Acta Cryst. E69, o835–o836]. In the solid state, the cations, anions and water molecules are interlinked by a network of O—HO, O—HBr and C—HBr interactions. The water molecule makes two O—HBr hydrogen bonds, generating [010] zigzag chains of alternating water molecules and bromide anions. The cation is involved in two intermolecular C—HCl interactions in the chloride salt, whereas three intermolecular C—HBr interactions are observed in the title bromide salt. This additional intermolecular C—HBr interaction links the adjacent water and bromide zigzag chains via cationic molecules. In addition, weak π–π stacking interactions are observed between pyridinium rings [centroid–centroid distance = 3.5664 (13) Å].