Constructor graph description of the hydrogen-bonding supra-molecular assembly in two ionic compounds: 2-(pyrazol-1-yl)ethylammonium chloride and diaquadichloridobis-(2-hydroxy-ethyl-ammonium)cobalt(II) dichloride

Covalent bond tables are used to generate hydrogen-bond pattern designator symbols for the crystallographically characterized title compounds. 2-(Pyrazol-1-yl)ethyl-ammon-ium chloride, C₅H₁₀N ₃ ⁺·Cl^-, (I), has three unique, strong, charge-assisted hydrogen bonds of the types N - H⋯Cl and N - H⋯N that form unary through ternary levels of graph-set inter-actions. Diaquadichloridobis(2-hydroxy-ethyl-ammonium)-cobalt(II) dichloride, [CoCl ₂(C₂H₈NO)₂(H₂O) ₂]Cl₂, (II), forms five unique charge-assisted hydrogen bonds of the types O - H⋯Cl and N - H⋯Cl. These form graph-set patterns up to the quinary level. The Co complex in (II) resides at a crystallographic inversion center; thus the number of hydrogen bonds to consider doubles due to their G-equivalence, and the handling of such a case is demonstrated.