2-Methylxanthen-9-one

In the title compound, C₁₄H₁₀O₂, the tricycle is not planar, being bent with a dihedral angle of 4.7 (1)° between the two benzene rings. In the crystal, π–π inter­actions between the six-membered rings of neighbouring mol­ecules [centroid–centroid distances = 3.580 (3) and 3.605 (3) Å] form stacks propagating along [101].

Ethyl 2-[4-(2-chloro­benzo­yl)-2,6-di­methyl­phen­oxy]ethano­ate

The asymmetric unit of the title compound, C₁₉H₁₉ClO₄, contains two independent mol­ecules. The dihedral angles between the benzene rings are 63.41 (8) and 61.41 (9)°. Adjacent mol­ecules of different types are inter­connected in pairs through π–π inter­actions between their central benzene rings [centroid–centroid separation = 3.801 (2) Å, inter­planar spacing = 3.605 (2) Å, centroid shift = 1.204 (2) Å]. Finally, C—H...O hydrogen bonds link these dimers into bilayers parallel to (100).