Craig et al. [Acta Cryst. (2022), C78, 470–480] report on the synthesis of the quaternary sulfide Li₄CdGe₂S₇, which is remarkable in several respects.

Three new chalcogen-bonded cocrystals were synthesized and characterized by single-crystal X-ray diffraction, powder X-ray diffraction and ⁷⁷Se/¹²⁵Te magic-angle spinning NMR spectroscopy.

The syntheses and structures are reported for three 4-styrylquinoline derivatives formed by reactions between (2-aminophenyl)chalcones and acetone.

The analytical characterization, absolute configuration and optical purity of (1S)-(+)- and (1R)-(−)-camphorsulfonic acid (CSA) are described. The procedure for the structure elucidation was based on HRMS, GC/MS and NMR spectroscopy. Moreover, theoretical calculations combined with the experimental results permitted the unambiguous assignment of the 1S,4R configuration to (+)-CSA and the 1R,4S configuration to (−)-CSA.

Peculiarities of the hydrogen bonding in a series of 2-amino-1,5-diazaspiro[4.5]dec-1-en-5-ium tosylates have been investigated. The role of water molecules and the conformation of the cation in the formation of hydrogen-bonded associates is discussed.

The relationship between close intermolecular contacts and intermolecular energies of interaction within the crystals of the 1,3-dihalo-5-nitrobenzenes with Cl, Br, and I is probed. The results reveal the relative role of π-stacking, self-complementary halogen…O(nitro) bonds, bifurcated C—H…O(nitro) interactions and Type I halogen–halogen interactions in terms of cohesive intermolecular energies of interaction.

Three derivatives of pyrido[3,4-d]pyridazine were synthesized with the aim of discovering new biologically active agents. The potential cytotoxicity of these compounds was evaluated against one normal and four human cancer cell lines.

A theoretical examination of the structural, elastic, electronic and optical properties of the chalcogenide perovskite BaZrS₃ under pressures of 0 and 20 GPa was performed using density functional theory ab initio calculations.