Crystal structure and Hirshfeld surface analysis of dimethyl (1<i>R</i>*, 3a<i>S</i>*, 3a<SUP>1</SUP><i>R</i>*, 6a<i>S</i>*, 9<i>R</i>*, 9a<i>S</i>*)-3a<SUP>1</SUP>,5,6,9a-tetrahydro-1<i>H</i>,4<i>H</i>,9<i>H</i>-1,3a:6a,9-diepoxyphenalene-2,3-dicarboxylate

Creative Commons License

Alekseeva K. A., Raspertov P., Celikesir S., AKKURT M., Toze F. A. A., Sorokina E. A.

ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, ss.460-470, 2019 (ESCI) identifier identifier identifier

Özet

The title diepoxyphenalene derivative, C17H18O6, comprises a fused cyclic system containing four five-membered rings (two dihydrofuran and two tetrahydrofuran) and one six-membered ring (cyclohexane). The five-membered dihydrofuran and tetrahydrofuran rings adopt envelope conformations, and the six-membered cyclohexane ring adopts a distorted chair conformation. Two methyl carboxylate groups occupy adjacent positions (2- and 3-) on a tetrahydrofuran ring. In the crystal, two pairs of C-H center dot center dot center dot O hydrogen bonds link the molecules to form inversion dimers, enclosing two R-2(2)(6) ring motifs, that stack along the a-axis direction and are arranged in layers parallel to the bc plane.