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ISSN: 2414-3146

May 2023 issue

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Cover illustration: The number of structurally characterized 1:1 salts of the feedstock chemical 4-picolylamine is limited. In the monohydrate of the perchlorate salt of 4-picolylamine, pyridin-4-ylmethanaminium perchlorate monohydrate, the two crystallographically distinct 4-picolylammonium cations exhibit different conformations. The supramolecular structure in the solid state features an intricate tri-periodic network of N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds. See: Seidel & Kolev [IUCrData (2023). 8, x230459].

metal-organic compounds

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The anion of the cluster complex salt, (H-DABCO)4[Nb6Cl12(NCS)6], comprises octa­hedral Nb6 cluster units, which are coordinated by twelve μ2-bridging chlorido ligands and six terminal N-bound thio­cyanato ligands.

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The title compound crystallizes in the triclinic P[\overline{1}] (Z = 2) space group as a half-sandwich complex resembling a three-legged piano stool. The crystal packing features C—H⋯F/I inter­actions.

organic compounds

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The structure of the natural product N-methyl­serotonin is reported as its hydrogen oxalate salt.

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Rhodium-catalyzed [2+2+2] cyclo­addition of carbon di­sulfide to o,N-dialkynyl­tosyl­anilines gives two isomeric indolo­thio­pyran­thio­nes as violet and red isomers. This is the first crystal structure of a red isomer, which crystallizes with one mol­ecule of di­chloro­methane in the asymmetric unit.

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The triazole ring in the title mol­ecule is not quite coplanar with the six-membered ring to which it is fused, the dihedral angle between the two least-squares planes being 2.52 (6)°. In the crystal, a layer structure is formed by N—H⋯N and C—H⋯O hydrogen bonds plus slipped π-stacking inter­actions, with the fused cyclo­hexene rings projecting to either side.

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The title Schiff base was obtained from the reaction of N-benzyl­isatin with p-arnisidine. The imino C=N double bond, exists in an E conformation.

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The title compound crystallizes in the monoclinic space group P21/n with two formula units per asymmetric unit (Z′ = 2) and features an intricate tri-periodic hydrogen-bonding network.

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The asymmetric unit of the title compound consists of two mol­ecules with slightly different conformations.
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