Crystal structure and Hirshfeld surface analysis of the zero-dimensional hybrid per­ovskite 1,4-di­azonia­bicyclo­[2.2.2]octane hexa­bromidostannate(IV)

The zero-dimensional (0D) per­ov­skite 1,4-diazo­niabi­cyclo­[2.2.2]octane hexa­bromido­stannate(IV) hemihydrate displays dominant H⋯Br/Br⋯H inter­actions, with smaller contributions from H⋯H, Br⋯Br and O⋯Br/Br⋯O contacts. These structural features underline the role of hy­dro­gen bonding in stabilizing the 0D framework, highlighting the potential of this compound for light-emitting and photonic applications.

New di­thiol­ene derivatives as coordination chromophores: structural, spectroscopic, electrochemical, Hirshfeld surface analyses, and in-vitro cytotoxicity

Seven substituted di­thiol­ene com­pounds featuring diverse functional groups were synthesized through nucleophilic substitution, cyclo­condensation, and transchalcogenation reactions. Structural characterization by single-crystal X-ray diffraction revealed distinct crystallographic systems and inter­molecular inter­actions, further supported by Hirshfeld surface and 2D fingerprint plot analyses. Selected derivatives were evaluated for anti­proliferative activity against the NCI-60 cancer cell line panel, exhibiting the lowest cell-growth percentages and negligible toxicity against normal cells.

Chiral resolution of (S)- and (R)-phenyl­lactic acid and a racemic macrocyclic nickel(II) com­plex: synthesis and crystal structures

The chiral resolution of (S)- and (R)-phenyl­lactic acid and a racemic macrocyclic nickel(II) com­plex is reported. The enanti­omers display hy­dro­gen bonding of the monomers and form one-dimensional zigzag chains. The homochiral natures were confirmed by circular dichroism spectral measurements.

Synthesis, crystal structure and anti­fungal activity of an ethyl­enedi­ammonium-templated nickel(II) pyromellitate coordination polymer

A water-soluble and solvent-processable Ni^II coordination polymer com­prising an extended one-dimensional anionic frame­work has been synthesized and structurally characterized. The anionic polymeric chains are charge balanced by ethyl­enedi­ammonium cations via Coulombic inter­actions, which also act as structure-directing agents. Extensive O—H⋯O and N—H⋯O hy­dro­gen bonding links the chains into a three-dimensional supra­molecular assembly. The com­pound shows notable anti­fungal activity against Candida albicans.

NMR and X-ray study of the diastereoselective [3+2] cyclo­addition reaction of chiral acridine with stable 2,4,6-tri­methyl­benzo­nitrile N-oxide

The determination of regioselectivity, diastereoselectivity and absolute configuration of isoxazoline cyclo­adducts using NMR spectroscopy and crystallographic analysis is reported.

Hydro­chlorides, hydrates, hydro­nitrate, and an unanti­cipated hydrolysis product of famotidine

The structures of a new polymorph of famotidine hydro­chloride, a famotidine hydro­chloride hydrate, a new hydro­nitrate salt of famotidine, and an unexpected hydrolyzed com­plex of famotidine are reported. The famotidine hydro­chloride hydrate and the hydrolyzed famotidine hydro­chloride have Z′ values of 2 and 4, respectively.

Effect of experimental parameters on the formation of hydrated sodium titanate nanocrystals

Obtaining high-performance hydrated sodium titanates is crucial for widespread applications in photocatalysis, sodium batteries, hy­dro­gen production, storage and solar cells. Herein, hydrated sodium titanate nanocrystals were prepared by a hydro­thermal method using industrially produced H₂TiO₃ nanopowders as the main raw material. The effects of NaOH con­cen­tration, reaction tem­per­a­ture and reaction time on the phase and morphology of the final products were studied.