Hydro­gen bonding and C—H⃛O interactions in 2‐[1‐(1‐naphthyl)ethyl]benzoic acid at 150 K

The title acid, C₁₉H₁₆O₂, crystallized in the centrosymmetric space group Pnna with three mol­ecules in the asymmetric unit (apparently the first reported instance of Z′ = 3 in this space group). Four intermolecular hydrogen bonds have O_D?O_A distances of 2.660 (2), 2.594 (2), 2.633 (2) and 2.646 (2) Å, and angles of 177 (2), 179 (2), 175 (2) and 175 (2)°. The four hydrogen bonds form two R(8) cyclic dimers, one about a twofold axis. Five leading intermolecular C—H?O interactions are present. Although first‐ and second‐level graph sets involving these nine interactions are dominated by finite patterns, a three‐dimensional network becomes evident upon analysis of higher‐level graphs. A number of intramolecular C—H?O interactions are also present.