Synthesis, crystal structure and some derivatives of the chlorotris(tetramethylphospholyl)uranium

Reaction of UCl4 with the potassium salt of the tetramethylphospholyl anion afforded the title compound, which has been transformed into the derivatives [U(η-C4Me4P)3X](X = H, Me, OPri); the trigonal crystal structure revealed that the three phospholyl ligands are pentahapto bonded to the uranium.