2-Benzyl­amino-5,5-dimeth­yl-4-phen­yl-1,3,2-dioxaphospho­rinane 2-oxide

In the title compound, C₁₈H₂₂NO₃P, the mol­ecules are linked by two N—H...N hydrogen bonds to form sheets built from R(8) rings.

9,10-Bis[(phenyl­sulfan­yl)meth­yl]anthracene

The title compound, C₂₈H₂₂S₂, was obtained by the reaction of 9,10-bis­(chloro­meth­yl)anthracene with the sodium salt of thiophenol in ethanol. The mol­ecule has an inversion centre, with the two phen­yl fragments in the same plane; this plane is approximately orthogonal to the anthracene plane [dihedral angle = 99.5 (7)°].

5,5-Dimethyl-4-(3-nitro­phen­yl)-2-oxo-2-(2-pyridylamino)-1,3,2-dioxaphospho­rinane

In the crystal structure of the title compound, C₁₆H₁₈N₃O₅P, mol­ecules are linked by two N—H...O hydrogen bonds, forming rings with an R₂²(8) motif.

5,5-Dimethyl-2-oxo-4-phenyl-2-(2-pyridylamino)-1,3,2-dioxaphospho­rinane

In the crystal structure of the title compound, C₁₆H₁₉N₂O₃P, mol­ecules are linked by two N—H...O hydrogen bonds, forming rings with an R₂²(8) motif; π–π stacking also contributes to the packing.