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.

Racemic (1SR,2SR,7aRS)-1,2,7a-trihydr­oxy-2-methyl­perhydro-1-phosphaindene 1-oxide monohydrate

In the title racemic compound, C₉H₁₉O₅P, all inter­atomic C—C and C—OH distances can be considered normal. The P—O and P=O distances are 1.5583 (8) and 1.5003 (7) Å, respectively. The rings are cis-fused, the phospho­lane ring exists in a slightly distorted envelope conformation and the cyclo­hexane ring adopts an almost ideal chair conformation. All hydroxyl groups are anti to the P=O bond. Mol­ecules are linked via medium-strength inter­molecular O—H...O hydrogen bonds into a three-dimensional network.