The new complex of [H2en][Cu(pydc)2].2H2O (1) (where H2en and pydc are ethylenediammonium and 2,6-pyridinedicarboxylate, respectively) was synthesized by the reaction of a mixture of ethylenediamine (en) and 2,6-pyridinedicarboxylic acid (H2pydc) in a mixture of CH3OH/H2O as solvent. This complex was fully characterized by elemental analysis, IR, UV–Vis spectroscopy as well as single-crystal X-...

Abstract The front cover artwork is provided by Tiddo J. Mooibroek. image shows the IsoStar distributions of carbonyl fragments around several σ‐ and π‐hole donors. Such analyses DFT calculations were used to assess utility σ‐/π‐hole interactions for crystal engineering. Read full text Article at 10.1002/cphc.202000927 .