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February 2020 issue
inorganic compounds
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The title compound, which formed twinned crystals, represents a highly hydrated carbonate with an unprecedented composition. Its unique crystal structure consists of a complex arrangement of anionic building units centred by octahedrally coordinated magnesium ions, caesium cations and free water molecules.
CCDC reference: 1982137
organic compounds
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In the title hemihydrate, the Schiff base molecule adopts an E configuration about the C=N bond and is approximately planar, with a dihedral angle between the quinoline ring system and the 1,2,4-triazole ring of 12.2 (1)°. In the crystal, one water molecule bridges two Schiff base molecules via O—H⋯N hydrogen bonds.
CCDC reference: 1961612
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The structure of the title compound, [H3O+·C12H24O6][N(SO2CF3)2−], known as an ionic liquid (m.p. 341 −343 K), has been determined at 113 K. One hydronium ion is complexed with an ordered 18-crown-6 molecule with H2OH⋯OC distances of 1.90–2.19 Å, and another hydronium ion with a disordered 18-crown-6 molecule with distances of 1.85–2.36 Å.
CCDC reference: 1982024
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In the title compound, C21H20BrNO4S, a key intermediate in the synthesis of the widely used β-lactamase inhibitor tazobactam, the five-membered thiazolidine ring adopts an envelope conformation and the four-membered azetidine ring is in a distorted planar conformation.
CCDC reference: 1981292
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The crystal structure of bispyrazolone, recrystallized from DMSO, indicates that the enamine tautomer is favored.
CCDC reference: 1949067
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In the title compound, the two pyridine n-oxide moieties are tethered by a bis-thioether group.
CCDC reference: 1982242
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The title compound crystallizes with a linear alkyl chain bound to the sulfur atom at the 2-position of the thiazole ring.
CCDC reference: 1982241
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The structure of a nitro-bis(thiophen-2-yl)quinoxaline has been determined at 298 K.
CCDC reference: 1983314
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The structure of the title nitrobis(thiophen-2-yl)quinoxaline has been determined at 298 K.
CCDC reference: 1983315
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Two independent molecules comprise the asymmetric unit of the title naphthalene derivative, which exhibit very similar conformations. The pendant 4-methyoxybenzene rings are splayed out of the plane through the naphthalene ring system.
CCDC reference: 1984009
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In the molecule of the title compound, the tricyclic core, consisting of a naphthalene entity fused together with a furan ring, deviates slightly from planarity.
CCDC reference: 1984687
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In the extended structure of the title molecular salt, the cations and anions are linked by N—H⋯O hydrogen bonds to generate [010] chains.
CCDC reference: 1985013
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In the title compound, C11H14N2O4, the two 2-oxopropyl groups are nearly perpendicular to the planar thymine unit. One methyl group of the oxopropyl substituent is disordered. In the crystal, C—H⋯O interactions help to connect the molecules into (001) layers.
CCDC reference: 1986083
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The relative stereo- and regiochemistry of the title compound, C25H19O7N, were determined by the X-ray analysis.
CCDC reference: 1986297
addenda and errata
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