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ISSN: 2414-3146

February 2023 issue

Highlighted illustration

Cover illustration: (E)-N-Phenyl-N-(phenyl­carbamo­yl)-3-[prop­yl(tri­methyl­sil­yl)amino]­acryl­amide, an insertion product from prop­yl(tri­methyl­sil­yl)[2-(tri­methyl­sil­yl)ethen­yl]amine and phenyl iso­cyanate, was obtained in the course of work on different types of silicon–nitro­gen compounds. Si—N bonds can be subjected to the insertion of different heteroallenes such as CO2 and iso­cyanates. See: Herbig & Böhme [IUCrData (2023). 8, x230117].

metal-organic compounds


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The `tromancenium-8-carb­oxy­lic acid' entity with a hexa­fluorido­phosphate counter-ion represents a rare case of a cationic carb­oxy­lic acid.

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In the title hydrido rhodium(I) monocarbonyl complex, one bis­phosphite ligand coordinates in the expected bidentate mode, whereas the other coordinates to the metal in a monodentate mode.

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The structure of the title compound exhibits disorder around a [\overline{4}] axis. The 4-meth­oxy­pyridine ligands have a propeller-like arrangement around the ruthenium at 52.01° from the RuN4 plane.

organic compounds


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The structure of a C16 benzalkonium chloride (C16BAC) is reported.

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The crystal structure of the title compound exhibits an envelope conformation for the pyrrolidine ring, which includes three chiral centres.

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The title compound crystallizes in the space group C2 with two mol­ecules in the asymmetric unit.

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The title compound, C22H29N3O2Si·0.5CHCl3, crystallizes in the the triclinic space group P[\overline{1}] with two host mol­ecules and one chloro­form mol­ecule in the asymmetric unit. The core of the mol­ecule consists of a urea unit bound to a 3-amino-acryloyl group. An intra­molecular N—H⋯O hydrogen bond is present in both crystallographically independent mol­ecules.

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The title mol­ecule adopts a cup-shaped conformation. In the crystal, layers lying parallel to the ab plane are formed by C—H⋯O hydrogen bonds and C—H⋯π(ring) inter­actions.

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The title compound represents the first instance of a 1,4-phenyl­ene bis­(carbonate) derivative characterized by X-ray diffraction.

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The title mol­ecule is essentially flat. In the crystal the mol­ecules are linked by a system of N—H⋯N hydrogen bonds formed by the hydrazinyl group, a Br⋯Br halogen bond, and π-stacking between the pyridine rings.
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