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ISSN: 2414-3146

February 2020 issue

Early view articles

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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.

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.

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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.

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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.

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The crystal structure of bis­pyrazolone, recrystallized from DMSO, indicates that the enamine tautomer is favored.

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In the title compound, the two pyridine n-oxide moieties are tethered by a bis-thio­ether group.

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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.

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The structure of a nitro-bis­(thio­phen-2-yl)quinoxaline has been determined at 298 K.

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The structure of the title nitro­bis­(thio­phen-2-yl)quinoxaline has been determined at 298 K.

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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.

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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.

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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.
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