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In the title compound, C13H9NO8·CH3OH, the main molecule possesses three carboxylic acid groups, which are asymmetrically distributed around the molecule core. This results in hydrogen-bonding motifs ranging from a chain to various rings. The combination of the chain motif together with a carboxylic dimer R22(8) ring motif creates a ribbon of molecules propagating along the c-axis direction. A second ribbon results from the combination of the chain motif together with a methanol solvent molecule and carboxyl-containing R44(12) ring motif. These two ribbons combine alternately, forming a hydrogen-bonded layer of molecules parallel to (2
0).
0).organic compoundsOpen access
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In the title hydrated salt, C8H18N+·C4H5O4−·H2O, the cyclooctyl ring of the cation is disordered over two positions in a 0.833 (3):0.167 (3) ratio. The structure contains various O—H.·O and N—H
O interactions, forming a hydrogen-bonded layer of molecules perpendicular to the c axis. In each layer, the ammonium cation hydrogen bonds to two hydrogen succinate anions and one water molecule. Each hydrogen succinate anion hydrogen bonds to neighbouring anions, forming a chain of molecules along the b axis. In addition, each hydrogen succinate anion hydrogen bonds to two water molecules and the ammonium cation.
O interactions, forming a hydrogen-bonded layer of molecules perpendicular to the c axis. In each layer, the ammonium cation hydrogen bonds to two hydrogen succinate anions and one water molecule. Each hydrogen succinate anion hydrogen bonds to neighbouring anions, forming a chain of molecules along the b axis. In addition, each hydrogen succinate anion hydrogen bonds to two water molecules and the ammonium cation.organic compoundsOpen access
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In the molecular structure of title compound, C18H13NO2, the succinimide ring is orientated away from the plane of the anthracene moiety by 71.94 (4)°. The crystal structure features three different types of intermolecular interactions, viz. C—HO, C—Hπ and π–π bonds. Molecules along the b axis stack on each other as a result of π–π interactions which have a centroid–centroid distance of 3.6780 (15) Å, while C—Hπ interactions are present between neigbouring stacks. Also, acting between the stacks are the C—HO interactions between the aromatic H atoms of the anthracene and the O atoms of the succinimide.
O, C—Hπ and π–π bonds. Molecules along the b axis stack on each other as a result of π–π interactions which have a centroid–centroid distance of 3.6780 (15) Å, while C—Hπ interactions are present between neigbouring stacks. Also, acting between the stacks are the C—HO interactions between the aromatic H atoms of the anthracene and the O atoms of the succinimide.organic compoundsOpen access
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The title organic salt, 6C3H10N+·C10H2O84−·C10H4O82−·4H2O, contains seven independent entities in the asymmetric unit which comprises three propylammonium cations, two water molecules, half a 2,5-dicarboxybenzene-1,4-carboxylate dianion (H2btc2−) and half a benzene-1,2,4,5-tetracarboxylate tetraanion (btc4−), the latter two anions being located about centres of inversion. One of the water molecules is disordered over two positions in a 0.55 (2):0.45 (2) ratio. The combination of molecular ions and water molecules results in an extensive and complex three-dimensional network of hydrogen bonds, the network being made up of nine unique N—HO interactions between the ammonium cations and the anions, as well as four unique O—HO interactions between the water molecules and the anions.
O interactions between the ammonium cations and the anions, as well as four unique O—HO interactions between the water molecules and the anions.
