Bis(μ-1,4-di­hydro­pyridin-4-one-κ²O:O)di-μ-perchlorato-κ⁴O:O′-bis­[aqua­(1,4-di­hydro­pyridin-4-one-κO)copper(II)] tetra­aqua­bis­(1,4-di­hydropyridin-4-one-κO)copper(II) tetra­kis­(perchlorate) 1,4-di­hydro­pyridin-4-one disolvate

The reaction of copper(II) perchlorate hexa­hydrate with 4-pyridone and pyrazine in 1-propanol serendipitously yielded crystals of the solvated title double salt as a byproduct. Both the monometallic Cu complex and the dimeric species exhibit classic Jahn-Teller-like elongations. Both complexes and the 4-pyridone mol­ecules are bound together by a network of classical hydrogen bonds.

2-Amino-5-chloro­pyridin-1-ium barbiturate dihydrate

The extended structure of the title hydrated salt is consolidated by numerous N—H⋯O and O—H⋯O hydrogen bonds.

7-tert-Butyl-1,3-bis­(eth­oxy­meth­yl)pyrene

Two mol­ecules of 7-tert-butyl-1,3-bis­(eth­oxy­meth­yl)pyrene form a dimer unit through π–π inter­actions in the crystal.

5-Amino­levulinic acid hydro­chloride

The crystal structure of 5-amino­levulinic acid hydro­chloride has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques.

Bepostastine besylate

The crystal structure of bepotastine besylate was refined using synchrotron X-ray powder diffraction data and optimized using density functional theory techniques.