Synthesis and reactivity of bis(imido) uranium(vi) cyclopentadienyl complexes†
Abstract
The bis(imido) uranium(VI)–C5H5 and –C5Me5 complexes (C5H5)2U(NtBu)2, (C5Me5)2U(NtBu)2, (C5H5)U(NtBu)2(I)(dmpe), and (C5H5)2U(NtBu)2(dmpe) can be synthesized from reactions between U(NtBu)2(I)2(L)x (L = THF, x = 2; L = dmpe, x = 1) and Na(C5R5) (R = H, Me); these complexes represent the first structurally characterized C5H5-compounds of uranium(VI) and they further highlight the differences between UO22+ and the bis(imido) fragment.