Easy access to stable pentavalent uranyl complexes

Reaction of UO2I2(THF)(3) with 1 molar equivalent of KC5R5 ( R = H, Me) in pyridine led to the uranyl( V) compound {[UO2(Py)(5)][KI2(Py)(2)]}(infinity), which is an infinite 1D polymer in its crystalline form; the UO2X(THF)(n) (X = I, OSO2CF3) complexes were obtained by reduction of their U( VI) parents with TlC5H5 or KC5R5 in THF.