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ISSN: 2414-3146

January 2024 issue

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Cover illustration: Tellurium/oxygen-containing heterocycles have received significant attention as potent enzyme inhibitors and anti­oxidants. While [1,4]oxatelluranes have been known for over seventy years, [1,3]oxatelluroles have remained unknown, making 5,6-di­methyl­benzo[d][1,3]oxatellurole the first member of this class. Both independent mol­ecules are folded along their Te⋯O axes, with an average angle φ = 25.1° between the Te–C–O planes and the remaining non-hydrogen atoms. A Hirshfeld plot indicates a weak inter­molecular inter­action between the two tellurium atoms in the asymmetric unit. See: Ponzo, Turner, Fronczek & Junk [IUCrData (2024). 8, x231076]

inorganic compounds


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Ti4Ni2C crystallizes isotypically with Ti4Ni2O, Nb4Ni2C and Ta4Ni2C and can be considered as a partially filled Ti2Ni structure with the C atom occupying an octa­hedral void.

metal-organic compounds


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In the crystal structure of the title compound, the central zinc(II) metal atom is surrounded by two N atoms of a bidentate 4,7-meth­oxy-1,10-phenanthroline ligand and two chlorido ligands in a distorted tetra­hedral coordination environment.

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The mol­ecular PdII title complex exhibits a square-planar coordination about the central metal atom, provided by two trans-arranged chlorido ligands and two nitro­gen atoms from the two neutral organic ligands.

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The reaction of 4-amino 3-nitro­benzoic acid and manganese dichloride tetra­hydrate in an ethanol–water mixture yielded the title complex[Mn(C7H5N2O4)2(C7H6N2O4)2(H2O)2]·2H2O. In the crystal, mol­ecules are linked by N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds.

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The solid-state structural analysis of a reduced iron bis­(di­thiol­ene) dimer reveals that the mol­ecule crystallizes with the center of the Fe2S2 ring system on a crystallographic center of inversion. The structure shows non-classical hydrogen-bonding inter­actions between imidazolium H atoms and the oxygen atoms of N,N-dimethyl formamide that co-crystallized together with the title compound.

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In the title triazole-based N-heterocyclic carbene rhodium(I) cationic complex with a tetra­fluorido­borate counter-anion, the Rh center has a distorted square-planar coordination geometry with expected bond distances.

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In the title salt hydrate, (C9H12NO)2[PdCl4]·0.5H2O, the PdII atom is coordinated by four chloride anions and the charge balance is provided by two ammonium cations formed from (1R,2S)-(+)-1-amino­indan-2-ol.

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In the crystal structure of the title compound, the nickel(II) metal center is surrounded by two tridentate 2,6-bis­(2-benzimidazol­yl)pyridine ligands in a distorted octa­hedral geometry. Hydrogen bonding is present between counter-ion and ligand.

organic compounds


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The title compound is the constitutional isomer of α-hy­droxy­butanoic acid. In the crystal, hydrogen bonds involving the alcoholic hydroxyl group give rise to centrosymmetric dimers that are extended to sheets perpendicular to the crystallographic c axis.

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The title compound represents the first reported example of a [1,3]oxatellurole, prepared in three steps from 3,4-di­methyl­phenol. Both independent mol­ecules are folded along their Te⋯O axes, with an average angle φ = 25.1° between the Te–C–O planes and the remaining non-hydrogen atoms. A Hirshfeld plot indicates a weak inter­molecular inter­action between the two tellurium atoms in the asymmetric unit.

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The synthesis, crystal structure and Hirshfeld analysis of cis-jasmone 4-methyl­thio­semicarbazone is reported. Two crystallographically independent mol­ecules are observed in the asymmetric unit, one of them being disordered over the carbon chain. In the crystal, the mol­ecules are linked by N—H⋯S and C—H⋯S inter­actions into independent centrosymmetric dimers.

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In the title compound, proton transfer from oxalic acid to the N atom of the heterocycle has occurred to form a 2:1 molecular salt. In the extended structure, N—H⋯O hydrogen bonds link the components into [100] chains, which feature R22(8) and R44(14) loops.

addenda and errata


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