The newest three members of the Editorial Board of Acta Crystallographica Section B are introduced.

We present the synthesis and characterization of four new crystalline forms of an N-derivative of l-phenyl­alanine with 2-naphthaldehyde, where the com­pound adopts different unfolded and folded conformations depending on its charge state and the supra­molecular environment. To characterize and classify such conformational differences, we propose the use of a dimensionless Shape Factor qu­antity defined as the Structural Aspect Ratio (SAR), which proves to be a simple but useful tool for this purpose, and its application could be extended to other conformational studies.

The crystal structure of the metastable form of S-ibu­pro­fen–nicotinamide cocrystals was solved from powder X-ray diffraction data and explains the main mechanisms responsible for the relative stability of the two forms of the cocrystals. This also made it possible to explain the transition mechanism between the two forms with tem­per­a­ture.

Crystallographic engineering and chemical synthesis modification play crucial roles in modulating material properties and designing multifunctional materials, such as those with second-harmonic genera...

Seven venetoclax solvates were structurally characterized and studied for their desolvation behaviour, leading to the identification of two solvent-free polymorphs. Advanced crystallographic and computational analyses, including Solvate Analyser, CSD-Particle, FTIR and solid-state NMR, revealed key factors governing solvate stability and transformation. Notably, the acetone solvate exhibited exceptional stability and the desolvated forms retained the molecular arrangement of their parent solvates.

Recent studies published in the Chemistry and crystal engineering section of IUCrJ emphasize developments both in methodology and techniques as well as the diverse range of classes of compounds being studied and of problems being tackled.

Based on crystalline polymorphism, we utilized a solvent-mediated crystal engineering strategy to synthesize three polymorphic copper-iodide clusters, 1 [Cu4I4(4-dpda)4], 1-Tol [Cu4I4(4-dpda)4·C7H8], ...