12-(2-Hy-droxy-6-oxo-cyclo-hex-1-en-yl)-9,10-di-hydro-8H-benzo[a]xanthen-11(12H)-one

Abstract

In the xanthenone system of the title compound, C23H20O4, the pyran ring has a maximum deviation of 0.111 (1) Å from planarity and the outer cyclo-hexene ring exhibits a puckered conformation. The three methyl-ene C atoms of the cyclo-hexene ring bonded to the pyran unit are disordered over two sets of sites [occupancies = 0.570 (3) and 0.430 (3)]. In the crystal, mol-ecules are linked by C-H⋯O and O-H⋯O hydrogen bonds, forming a two-dimensional network parallel to (110). A C-H⋯π inter-action occurs between these networks.

Fig. 1.

The structure of the title compound with the atom numbering scheme. Displacement ellipsoids for non-H atoms are drawn at the 50% probability level. For clarity only atoms of one disorder component of the disordered methylene groups are shown.

Fig. 2.

The packing and hydrogen bonding (dashed lines) of the title compound viewing along the a axis. For clarity only atoms of the major disorder component of the disordered methylene groups are shown.

Fig. 3.

The packing and hydrogen bonding (dashed lines) of the title compound viewing along the c axis. For clarity only atoms of the major disorder component of the disordered methylene groups are shown.