Abstract
Covalent bond tables are used to generate hydrogen-bond pattern designator symbols for the crystallographically characterized title compounds. 2-(Pyrazol-1-yl)ethylammonium chloride, C(5)H(10)N(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 interactions. Diaquadichloridobis(2-hydroxyethylammonium)cobalt(II) dichloride, [CoCl(2)(C(2)H(8)NO)(2)(H(2)O)(2)]Cl(2), (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.
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