Self-assembled supramolecular sheet- and channel-type frameworks in the p-phenetidinium hydrogen phthalate and cyclohexylaminium hydrogen phthalate hemihydrate salts.

The title compounds, p-phenetidinium hydrogen phthalate (or 4-ethoxyanilinium 2-carboxybenzoate), C(8)H(12)NO(+)·C(8)H(5)O(4)(-), (I), and cyclohexylaminium hydrogen phthalate hemihydrate (or cyclohexylaminium 2-carboxybenzoate hemihydrate), C(6)H(14)N(+)·C(8)H(5)O(4)(-)·0.5H(2)O, (II), form two- and one-dimensional supramolecular networks, respectively. In (I), the anionic-cationic network consists of R(3)(2)(6) and R(4)(4)(16) hydrogen-bonded rings forming a two-dimensional sheet along the (001) plane. In (II), O-H···O hydrogen bonds connect the glide-related anions, generating a supramolecular chain running parallel to [001] to which the cations are linked to form one-dimensional channels along [001]. The solvent water molecules, which reside on twofold axes, are trapped inside the molecular channels by N-H···O and O-H···O hydrogen bonds.