A 2D hydrogen-bonded network constructed from large organic dications

The crystal structure determination of N,N′-Bis-(2-aminoethyl)-phenazine-1,6-dicarboxamide dihydrochloride dihydrate reveals an essentially planar dication. A pair of ammonium groups tethered to the phenazine group in the 1 and 6 positions through alkyl amide links, act as hydrogen-bond donors to amide oxygen atoms of symmetry-related neighbouring dications. With each dication molecule having two hydrogen-bond donors and acceptors, an undulating 2D network is formed. The chloride ions, lying within the network voids, associate with the ammonium groups and pairs of water molecules. The network topology appears to be largely governed by cation–cation hydrogen-bonds, ionic associations involving the chloride ions and π–π-stacking interactions.