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The title complex, [Cd(C9H7O2)2(H2O)2], was obtained as an unintended product of the reaction of cadmium nitrate with hexa­methyl­ene­tetra­mine and cinnamic acid. The CdII ion lies on a twofold rotation axis and is coordinated in a slightly distorted trigonal–prismatic environment. In the crystal, the V-shaped mol­ecules are arranged in an inter­locking fashion along [010] and O—H...O hydrogen bonds link the mol­ecules, forming a two-dimensional network parallel to (001).

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The crystal structure of the title compound allowed the cis substituent orientation on the cyclo­penta­none ring to be established. The mol­ecular conformation and crystal packing are governed by a network of hydrogen bonds and by π–π stacking.

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The title compound, C14H18F3NO8, was produced through conjugation of 1,3,4-tri-O-acetyl-2-azidode­oxy-α,β-L-fucose with tri­fluoro­acetyl chloride in the presence of bis­(di­phenyl­phosphino)ethane in tetra­hydro­furan at room temperature. The X-ray crystal structure reveals that the β-anomer of the product mixture crystallizes from ethyl acetate/hexa­nes. The compound exists in a typical chair conformation with the maximum possible number of substituents, four out of five, located in the sterically preferred equatorial positions. The major directional force facilitating packing of the mol­ecules are N—H...O hydrogen bonds involving the amide moieties of neighboring mol­ecules, which connect mol­ecules stacked along the a-axis direction into infinite strands with a C11(4) graph-set motif. Formation of the strands is assisted by a number of weaker C—H...O inter­actions involving the methine and methyl H atoms. These strands are connected through further C—H...O and C—H...F inter­actions into a three dimensional network

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In the title proton-transfer organic salt, C5H6.3N5+·C8H4.7O4·C3H7NO, the adeninium moiety is protonated at the N atom in the 1-position of the 6-amino-7H-purin-1-ium (adeninium) cation. In the solid state, the second acidic proton of isophthalic acid is partially transferred to the imidazole N atom of the adeninium cation [refined O—H versus N—H ratio = 0.70 (11):0.30 (11)]. Through the partially transferred proton, the adeninium cation is strongly hydrogen bonded (N—H...O/O—H...N) to the isophthalate anion. This strong inter­action is assisted by another N—H...O hydrogen bond originating from the adeninium NH2 group towards the isophthalate keto O atom, with an R22(8) graph-set motif. This arrangement is linked via N—H...O hydrogen bonds to the O atoms of the carboxyl­ate group of an isophthalate anion. Together, these hydrogen bonds lead to the formation criss-cross zigzag isophthalate...adeninium chains lying parallel to (501) and (50-1). The adeninium cations and the isophthalate anions are arranged in infinite π stacks that extend along the c-axis direction [inter­planar distance = 3.305 (3) Å]. Mol­ecules are inclined with respect to this direction and within the stacks they are offset by ca. half a mol­ecule each. Combination of the N—H...O and O—H...N hydrogen bonds with the π–π inter­actions forms infinitely stacked isophthalate...adeninium chains, thus leading to a two-dimensional supra­molecular structure with parallel inter­digitating layers formed by the π stacked isophthalate...adeninium chains. The DMF mol­ecules of crystallization are bonded to the adeninium cations through strong N—H...O hydrogen bonds and project into the lattice space in between the anions and cations. There are also C—H...O hydrogen bonds present which, combined with the other inter­actions, form a three-dimensional network. The crystal under investigation was found to be split and was handled as if non-merohedrally twinned.

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The title compound consists of a macrocyclic ring with an MnIII—N—O repeat unit that occurs four times, producing a mol­ecule with an overall square structure. Two Na+ ions are captured above and below the central cavity of the mol­ecule.
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