The structure and spectroscopic characterization of complexes with tetraethyl methylenediphosphonate in solution and in solid state

The crystal structure of UO 2 2 + complex with tetraethyl methylenediphosphonate, CH2[P(O)(OCH2CH3)2]2, POPO, and its spectroscopic characterization in solution and in solid state are discussed. The complex was also characterized by CHN microanalytical procedures, infrared, absorption and luminescence spectroscopy and by single crystal X-ray diffraction. Uranyl in the [UO2(POPO)(NO3)2] complex is six-coordinated.