Interplay of Hydrogen Bonds in Assembling (4,4)-Coordination Networks: Transformations from Open to Interpenetrated Networks via Anion Exchange

Open (4,4)-coordination networks were shown to assemble via N−H···O hydrogen bonds in two different ways:  the usual
offset packing via β-sheet hydrogen bonds and an unprecedented trigonal packing. Both of the structures have continuous channels that are
occupied by guest molecules (nitrobenzene or EtOH and H2O) which account for 37% or 28% of the crystal volume. Interestingly, these
complexes have shown an ability to exchange ClO4- with PF6- ions and transform into the doubly interpenetrated varieties.