6-(Hex-5-en­yloxy)naphthalene-2-carb­oxy­lic acid

The asymmetric unit of the title compound, C(17)H(18)O(3), comprises three independent mol­ecules with similar geometries. In each mol­ecule, the carbonyl group is twisted away from the napthalene ring system, making dihedral angles of 1.0 (2), 1.05 (19)° and 1.5 (2)°. The butene group in all three mol­ecules are disordered over two sets of sites, with a refined occupancy ratio of 0.664 (6):0.336 (6). In the crystal, mol­ecules are oriented with respect to their carbonyl groups, forming head-to-head dimers via O—H⋯O hydrogen bonds. Adjacent dimers are further inter­connected by C—H⋯O hydrogen bonds into chains along the a-axis direction. The crystal structure is further stabilized by weak C—H⋯π inter­actions.