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ISSN: 2414-3146

May 2021 issue

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Cover illustration: (Cobaltoceniumyl­amido)­pyridinium hexa­fluorido­phosphate [Co(C5H5)(C10H9N2)]PF6, was synthesized from deproton­ated 1-amino­pyridinium iodide, followed by microwave-assisted nucleophilic aromatic substitution of iodo-cobaltocenium iodide. After anion exchange with potassium hexa­fluorido­phosphate, it crystallized as orange prisms in the space group Pc. This very stable pyridine nitrene adduct is the first example of a cobaltocenium derivative, formally containing a nitrene nitro­gen species. See: Menia, Höfer, Wurst & Bildstein [IUCrData (2021). 6, x210460].

metal-organic compounds

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The title compound was prepared in a microwave-assisted synthesis and is the first example of a cobaltocenium derivative formally containing a nitrene nitro­gen species.

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An updated structure is reported for a bis­(oxo) MoVI complex that is modeled after the molybdenum cofactor. An analysis of lengths and angles suggests that this dataset offers a more accurate depiction of bonding for the MoVI=O moiety.

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The asymmetric unit of the title coordination polymer [Zn(C9H6NO2)2(C10H8N4)]n, consists of one ZnII cation, one bidentate 1H-indole-5-carboxyl­ate (I5C) anion and half of a 4,4′-azobi­pyridine (Abpy) neutral ligand. The coordination polymer is stabilized by a combination of N—H⋯O and C—H⋯π inter­actions, which leads to the formation of wave-like two-dimensional coordination polymeric layers.

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The crystal structure of the bis­(1-methyl­imidazole)-ligated iron(II) picket-fence porphyrin derivative [FeII(C68H44N12O4)(C4H6N2)2]·C4H6N2·1.5C4H8O is investigated.

organic compounds

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The title coumarin derivative was isolated from the plants of Sophora japonica. In the crystal, mol­ecules are linked by O—H⋯O and C—H⋯O hydrogen bonds into chains along the [101] direction.

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In the crystal of the title cyclo­hexyl­idene derivative, mol­ecules associate via C—H⋯N hydrogen bonds, forming a three-dimensional network.

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The title compound arose from an unexpected alcoholysis of a prodrug by the methanol solvent.
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