Synthesis and some reactions of tris(cyclopentadienyl)-uranium(IV) hydrides; crystal structure of [U(C5H4But)3H]

Abstract

The uranium(IV) hydrides [U(C₅H₄R)₃H](R = SiMe₃1 or Bu^t2) which are thermally very stable, were isolated from the reactions of the corresponding chlorides with KBEt₃H. The hydridic character of 1 and 2 was demonstrated by their reactions with chloroform and alcohols, and by treatment with NEt₃HBPh₄, which gives the cationic complexes [U(C₅H₄R)₃][BPh₄]. The crystal structure of 2 has been determined.