A compilation of review articles on σ-hole interactions published since 2013 is presented alongside an overview of the 11 articles in the special issue on this topic.

The structures for 3′-(N=CHC₆H₄-p-CH₃)-4-methylchalcone and 3′-(NHCOCH₃)-4-methylchalcone are the first reported structures containing their respective 3′-substituents.

A versatile synthesis is reported for 5-(arylmethylideneamino)-4-(1H-benzo[d]imidazol-1-yl)pyrimidines and structures are reported for three examples, one of them in two crystal forms, as well as for two intermediates in the synthetic sequence. A diverse range of hydrogen-bonding patterns leads to supramolecular assemblies ranging from finite zero-dimensional aggregates to three-dimensional framework structures.

The current study demonstrates the cocrystallization of pyrazinamide with homophthalic acid employing the reflux method, and the cocrystallization of the commercially available heterocyclic drug carbamazepine with 5-chlorosalicylic acid, trans-cinnamic acid and nicotinamide. The synthesized cocrystals were characterized by FT–IR, PXRD and SC-XRD techniques, followed by thermal stability studies based on DSC and TGA analysis.

N-[(4-Fluorophenyl)sulfanyl]phthalimide (FP) was investigated via quantum chemical analysis. Theoretical calculations (DFT) were used to predict the chemical and biological activities, and druglikeness results indicate that FP has a good physicochemical profile. These results can be used for future studies on drug development. Moreover, since FP is close to the nontoxicology limit, experimental in vitro studies could further support its potential as a drug candidate.

The crystal structure of the new intermetallic Tb_2–xNd_xZn_17–yNi_y (x = 0.5, y = 4.83), with a maximum disordered structure, has been determined by single-crystal X-ray diffraction. It represents the structure family based on the Th₂Zn₁₇ structure type.