An X-ray investigation of stereo­selectivity in the inter­actions of [Co(en)₃]³⁺ with [Co(ox)₃]³⁻ (en is ethane-1,2-di­amine and ox is oxalate)

[Co(en)₃][Co(ox)₃]·5H₂O shows stereo­selective hydrogen-bonding inter­actions depending on the axis of inter­action of [Co(en)₃]³⁺. This has implications for chiral discriminations in solution.

Synthesis and structure of two isomers of a molybdenum(II) 2-butyne com­plex stabilized by bioinspired S,N-bidentate ligands

Two isomers of the molybdenum(II) com­plex Mo(CO)(C₂Me₂)(S-Phoz)₂ [S-Phoz is 2-(4,4-di­methyl­oxazolin-2-yl)thio­pheno­late] have been synthesized and characterized by X-ray diffraction at 100 K and by spectroscopy (NMR and IR). They show quite different Mo—N and Mo—S distances.

D-Mannosamine hydro­chloride (2-amino-2-de­oxy-D-mannose hydro­chloride): ionic hydrogen bonding in saccharides involving chloride and aminium ions

The X-ray crystal structure of D-mannosamine hydro­chloride (2-amino-2-de­oxy-D-mannose hydro­chloride) was determined and com­pared to those of structurally-related α-D-glucosa­mine hydro­chloride and β-D-galactosamine hydro­chloride, with a focus on ionic hydrogen bonding in these crystals.

Synthesis, structural analysis, and docking studies with SARS-CoV-2 of a trinuclear zinc com­plex with N-phenyl­anthranilic acid ligands

A trinuclear zinc com­plex with six N-phenyl­anthranilic acid ligands is structurally characterized and docking with SARS-CoV-2 is reported.

Structural studies of various olmesartan solvates

The preparation and structural investigation of seven solvates of the anti­hypertensive drug olmesartan are described. All the structures were found to be isostructural and the supra­molecular arrangements are held in a similar way by strong N—H⋯O hydrogen bonds.

Synthesis and properties of a novel deca­cyclic S,N-hetero­acene

A novel π-extended deca­cyclic S,N-hetero­acene with a conjugated backbone has been attained by the Cadogan reaction. The single-crystal structure is reported, as well as the optical and electrochemical properties.

Crystal structures of three β-halolactic acids: hydrogen bonding resulting in differing Z′

The crystal structures of three β-halolactic acids have been determined: β-chloro­lactic acid (I) (Z′ = 2), β-bromo­lactic acid (II) (Z′ = 2), and β-iodo­lactic acid (III) (Z′ = 1). The difference between the mol­ecules in the asymmetric units of I and II is due to the direction of the hydrogen bond of the alcohol group to a neighboring mol­ecule, which results in changes in the hydrogen-bond network.