O,O′-Diiso­propyl (4-methyl-7-coumarinyl­oxy)­phospho­no­thio­ate

The asymmetric unit of the title compound, C₁₆H₂₁O₅PS, contains two symmetry-independent mol­ecules. The overall molecular geometry of both mol­ecules is very similar. The coumarin ring systems are only insignificantly distorted from planarity. In the structure, C—H...O and C—H...π weak intermolecular hydrogen bonds can be found. In addition, stacking interactions between the rings are present.