(a) Hydrogen-bonding patterns in 1. A section of the C21(4) chain pattern is highlighted in orange, and a section of one of the two possible C22(6) chain patterns is highlighted in red. The R43(10) ring pattern is highlighted in blue. Colour code for the hydrogen bonds: N1—H11⋯O1 green, N1—H12⋯O2 magenta, N1—H13⋯O2 blue. (b) Cation–anion ladder motif in 1 formed by the repetition of benzylammonium–phenylacetate pairs. Phenyl rings and CH2 H atoms are omitted for clarity.