The preparation and structural elucidation of uranium (VI) complexes and salts of the phosphorus ylides Ph3PCHCOPh, Ph3PC(COMe)(COPh) and Ph3PCHCOOCH2CH3

The reaction in methanol of the phosphorus ylides Ph3PCHCOPh, benzoylmethylenetriphenylphosphorane (BPPY), and Ph3PC(COMe)(COPh), α-acetyl-α-benzoylmethylenetriphenylphosphorane (ABPPY) with UO2(NO3)2 · 6H2O at 273 K leads to the formation of O-coordinated bis(ylide)-uranium (VI) complexes of the type [UO2(ylide)2(NO3)2], whereas the reaction of BPPY and UO2(NO3)2 · 6H2O under reflux in benzene yields the salt View the MathML source[H-BPPY]2+[U2O4(NO3)4(OH)2]2-. The reaction of Ph3PCHCOOCH2CH3, carbethoxymethylenetriphenylphosphorane (EPPY) with UO2(CH3COO)2 · 2H2O produces the salt [H-EPPY]+[UO2(CH3COO)3]−. The structures of the free ylides ABPPY and EPPY are also discussed.