O-Phenyl (triphenyl­phospho­niometh­yl)­phospho­nate phenol solvate: supra­molecular structure generated by O-H...O, C-H...O and C-H...[pi](arene) hydrogen bonds

The title compound, C₂₅H₂₂O₃P₂·C₆H₆O, has a zwitterionic betaine-like structure and crystallizes as a phenol solvate. The two mol­ecular components are held together by an almost linear inter­molecular O-H...O hydrogen bond. The structure also contains three weak C-H...O and two C-H...[pi](arene) inter­actions.