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ISSN: 2414-3146

March 2020 issue

Early view articles

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metal-organic compounds


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The title compound consists of a manganese(II) ion that is bonded to four bromide atoms in a tetra­hedral coordination, and a cation based on an imidazolium group with one ethyl and one adamantyl (the simplest diamondoid) group.

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The reaction of ligand 5,7-di­hydro-1H,3H-dithieno[3,4-b:3′,4′-e]pyrazine with CuI lead to the formation of a three-dimensional coordination polymer.

organic compounds


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In the title compound, the pyran ring is in a half-chair conformation. The essentially planar naphthalene ring system forms a dihedral angle of 14.37 (5)° with the fused benzene ring. In the crystal, pairs of mol­ecules are connected into inversion dimers by weak C—H⋯O hydrogen bonds to generate R_{2}^{2}(6) loops.

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In the title compound, the seven-membered ring is in a psuedo-chair conformation. In the crystal, mol­ecules are linked by weak C—H⋯O hydrogen bonds forming layers parallel to (010). In addition, there are weak π–π stacking inter­actions between inversion-related naphthalene ring systems.

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In the title solvate, the tertiary amine adopts a stair-like conformation, with all imine and amine groups forming N—H⋯O and O—H⋯N hydrogen bonds with the lattice methanol mol­ecules.

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The crystal structure of the head-to-head photodimer of indeno­indene, obtained by irradiation of 1-(1-benzo­cyclo­butenyl­idene)benzo­cyclo­butene, is reported.

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In the title compound, he pyran ring is in a half-chair conformation and the fused ring system comprising the benzene and cyclo­hexene rings is essentially planar and forms a dihedral angle of 27.95 (6)° with the other benzene ring. In the crystal, O—H⋯O hydrogen bonds connect the mol­ecules into chains propagating along [001].

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A new quinazolinthione derivative was synthesized, and X-ray diffraction analysis proved the E configuration for the exocyclic double bond in the mol­ecule.

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[1–9-NαC]-Linusorb B3 (Cyclo­linopeptide A) was extracted from flaxseed oil crystals formed in dimethyl sulfoxide. The mol­ecule has four intra­molecular N—H⋯O hydrogen bonds, and the DMSO solvate mol­ecule is bound to the Phe6 amino acid by a fifth N—H⋯O hydrogen bond.

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The title mol­ecule has inversion symmetry, adopting the shape of a St Andrew's cross. It shows dihedral angles between adjacent aryl units of around 50° whereas torsion angles of ca 10° are found along the aryl­ene vinyl­ene path.

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The dihedral angle between the pyrrolo­[1,2-c]pyrimidine ring system and the benzene ring is 80.2 (9)°. In the crystal, inversion dimers linked by pairs of C—H⋯O inter­actions generate R_{2}^{2}(16) loops. Several aromatic π–π stacking inter­actions between the pyrrolo­[1,2-c]pyrimidine rings, as well as separately between the pyrrolo and pyrimidine groups [shortest centroid–centroid separation = 3.5758 (14) Å], help to consolidate the packing.

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In the crystal, mol­ecules of the title compound are linked into (100) sheets by N—H⋯N hydrogen bonds.
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