1,4,11,12-Tetra­hydro-9,10-anthraquinone

In the title compound, C₁₄H₁₂O₂, the cyclo­hexene ring adopts an envelope conformation, while the remaining fragment of the anthraquinone skeleton is planar.

(Z)-1-Phenyl-3-[3-(4,4,5,5-tetra­methyl-1,3,2-dioxaborolan-2-­yl)phenyl­amino]but-2-en-1-one

The title compound, C₂₂H₂₆BNO₃, is the first example of a boron-containing enaminone to be characterized by X-ray diffraction. The B atom lies in a three-coordinate environment and shows no additional intra- or inter­molecular inter­actions. The 4,4,5,5-tetra­methyl-1,3,2-dioxaborolan-2-yl group is roughly coplanar with the adjacent aromatic ring, as expected if considerable dative bonding is occurring between the aromatic p-π electrons and the empty p-orbital on the B atom.