Crystal structure of the benzene solvate of bis[2-(o-diphenylphosphorylphenoxy)ethyl] ether

Using x-ray diffraction analysis, we have determined the molecular structure of the phosphorus-containing podand bis[2-(o-diphenylphosphorylphenoxy) ethyl] ether in the crystal of its benzene solvate. We have established a considerable difference between the conformations of the free podand and its (previously studied) "guest—host" complex with an organic ammonium cation.Institute of Physiologically Active Substances, Russian Academy of Sciences, 142432 Chernogolovka. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 3, pp. 624–629, March, 1992.