Crystal structure and features of 3',8-di-benzyl-idene-4a,5,6,7,8,8a-hexa-hydro-2' H-spiro-[chromene-2,1'-cyclo-hexa-n]-2'-one

Alexander Anis'kov; Vyacheslav Grinev; Irina Klochkova

doi:10.1107/S2056989017014165

Crystal structure and features of 3',8-di-benzyl-idene-4a,5,6,7,8,8a-hexa-hydro-2' H-spiro-[chromene-2,1'-cyclo-hexa-n]-2'-one

Acta Crystallogr E Crystallogr Commun. 2017 Oct 6;73(Pt 11):1622-1625. doi: 10.1107/S2056989017014165. eCollection 2017 Nov 1.

Authors

Alexander Anis'kov¹, Vyacheslav Grinev¹, Irina Klochkova¹

Affiliation

¹ Institute of Chemistry, National Research Saratov State University, 83 Astrakhanskaya St., Saratov 410012, Russian Federation.

Abstract

The synthesis and crystal structure of the title compound, C₂₈H₂₈O₂, are reported. The C=C-C-C torsion angles in the phenyl-methyl-idene units are 166.6 (3) and -48.0 (4)°. In the crystal, mol-ecules form a three-dimensional network by means of weak C-H⋯O hydrogen bonds. The most important contributions to the crystal structure are the H⋯H inter-actions (68.8%), while the H⋯O contacts account for 4.5%.

Keywords: X-ray structural analysis; crystal structure; non-covalent interactions; spiro heterocycle.

Grants and funding

This work was funded by Russian Science Foundation grant Project 15-13-10007.