Crystal structures of metallocene complexes with uranium–germanium bonds

Abstract

The first structural examples of complexes with uranium–germanium bonds are presented, namely, bis[3,5-bis(trifluoromethyl)phenyl-2κC 1](hydrido-2κH)(iodido-1κI)bis[1,1(η5)-pentamethylcyclopentadienyl]germaniumuranium(Ge—U), [GeU(C10H15)2(C8H3F6)2HI], and bis[3,5-bis(trifluoromethyl)phenyl-2κC 1](fluorido-1κI)(hydrido-2κH)bis[1,1(η5)-pentamethylcyclopentadienyl]germaniumuranium(Ge—U), [GeU(C10H15)2(C8H3F6)2FH]. The two complexes both have a long U—Ge bond [distances of 3.0428 (7) and 3.0524 (7) Å].

Cooperative dihydrogen activation with unsupported uranium–metal bonds and characterization of a terminal U(iv) hydride

“…2–7 This has traditionally been done with an early transition metal, redox-inactive but highly Lewis acidic metal such as zirconium( iv ) paired with a low-valent middle or late transition metal such as cobalt, 8–10 iron, 11 or iridium. 12 While this reactivity is well-established with transition metals, 13 the focus with f elements has been on the synthesis of new f element-metal bonds, 14–45 with very little reactivity demonstrated with these complexes. 46,47 In fact, reports of metal–metal cooperativity in f element chemistry are rare, 48 while there are examples of using transition metals to enhance or form unusual moieties with f elements.…”