Abstract: | The most remarkable aspect of the crystal structure of the title compound (systematic name: 3,4‐dihydro‐2,2‐dimethyl‐2H‐naphtho1,2‐b]pyran‐5,6‐dione), C15H14O3, is that a π‐stacking interaction is present between the two naphthalene ring systems of symmetry‐related molecules. Apart from these π–π interactions, different molecules are held together by weak C—H?O hydrogen‐bonding interactions. |