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Figure 6
The hydroxonium cation has the V-shape expected for an H3O+ cation flanked by two hydrogen-bonded waters. Note that the H atoms that are not engaged in bonding necessary for the formation of the hydroxonium cation are engaged in hydrogen bonding to chloride anions [symmetry codes: (i) x, −y + [{3\over 2}], z − [{1\over 2}]; (ii) −x + 2, y − [{1\over 2}], z − [{1\over 2}]]. In contrast, its geometrical isomer, viz. H2O–H2O–H3O+, is shown in Fig. 7[link].

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 71| Part 1| January 2015| Pages 32-38
doi:10.1107/S2053229614025637
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