rac-Dimethyl [(9-anthr­yl)(4-methyl­anilino)meth­yl]phospho­nate

The title compound, C24H24NO3P, crystallizes as a racemate with two mol­ecules in the asymmetric unit. The structural features (bond lengths and angles) of the two mol­ecules are almost identical. The dihedral angle between the anthracene and toluidine rings is similar in the two mol­ecules, with values of 48.36 (9) and 51.15 (9)°. The methyl groups of one of the meth­oxy groups in one mol­ecule is disordered over two sets of sites, the major component having a site occupancy of 0.636 (3). In the crystal, both molecules are linked into inversion dimers by pairs of N—H⋯O hydrogen bonds

Diethyl [(9-anthr­yl)(4-methyl­anilino)meth­yl]phospho­nate

The title compound, C26H28NO3P, crystallized with two independent mol­ecules in the asymmetric unit. The structural features (bond lengths and angles) of the two mol­ecules are almost identical. The inter­planar angle between the anthracene and toluidine rings is similar in the two mol­ecules, with values of 82.92 (5) and 80.70 (5)°. In the crystal, both molecules form inversion dimers linked by pairs of N—H⋯O hydrogen bonds. Three of the four ethyl groups are disordered over two sets of sites, the major components having occupancies of 0.748 (15), 0.77 (4) and 0.518 (19)