SINGLE CRYSTAL X-RAY ANALYSIS OF ISOMERIC 2-(2,4,4-TRIMETHYL-3,4-DIHYDRO-2<i>H</i>-BENZO[<i>h</i>]CHROMEN-2-YL)-1-NAPHTHYL ACETATE AND 3-(2,4,4-TRIMETHYL-3,4-DIHYDRO-2<i>H</i>-BENZO[<i>g</i>]CHROMEN-2-YL)- 2-NAPHTHYL ACETATE
Single crystal X-ray structure characterization of isomeric 2-(2,4,4-trimethyl-3,4-dihydro-2<i>H</i>-benzo[<i>h</i>]chromen-2-yl)-1-naphthyl acetate (1) and 3-(2,4,4-trimethyl-3,4-dihydro-2<i>H</i>-benzo[<i>g</i>]chromen-2-yl)-2-naphthyl acetate (2) is described. Compound 1 crystallizes in the centrosymmetric monoclinic space group <i>P</i>2<sub>1</sub>/<i>c</i> with all atoms situated in general positions. Isomeric compound 2 crystallizes in the centrosymmetric triclinic space group <i>P</i>-1 and its structure consists of two crystallographically independent molecules with all atoms located in general positions. In addition to intramolecular C-H⋯O bonding, 2 is involved in two intermolecular C-H⋯O interactions resulting in a one-dimensional H-bonded network.