3,5,5,6,8,8-Hexamethyl-5,6,7,8-tetrahydro-2-naphthoic acid (AHTN–COOH)

Abstract

The title compound, C17H24O2, is the product of a haloform reaction of 6-acetyl-1,1,2,4,4,7-hexamethyltetraline (AHTN). The compound is a racemic mixture with a disorder in its aliphatic ring [occupany ratio 0.683 (4):0.317 (4)] due to two possible half-chair forms. The carboxylic acid unit is slightly twisted out of coplanarity with the aromatic system [dihedral angle = 29.26 (6)°]. In the crystal, pairs of short classical intermolecular O—H...O hydrogen bonds link pairs of molecules around a center of symmetry.