Crystallographic characterization of (C(5)H(4)SiMe(3))(3)U(BH(4)).

New syntheses have been developed for the synthesis of (borohydrido-κ(3) H)tris-[η(5)-(tri-methyl-sil-yl)cyclo-penta-dien-yl]uranium(IV), [U(BH(4))(C(8)H(13)Si)(3)] or Cp'(3)U(BH(4)) (Cp' = C(5)H(4)SiMe(3)) and its structure has been determined by single-crystal X-ray crystallography. This compound crystallized in the space group P and the structure features three η (5)-coordinated Cp' rings and a κ (3)-coordinated (BH(4))(-) ligand.