Metal–carbon σ-bond in organometallic complexes of uranium. The crystal and molecular structures of U(C5H5)3(p-CH3C6H4CH2) and U(C5H5)3(nC4H9)

[{[(η7-C2B10H12)(η6-C2B10H12)U][K2(thf)5]}2]: A Metallacarborane Containing the Novelη7-C2B10H124− Ligand

“…These values are very close to those of UÀC s bonds normally observed in organouranium compounds, for instance, 2.43 (2) in [(C 5 H 5 ) 3 U(nBu)], [11] 2.56(1) in [(C 5 H 5 ) 3 U(nBu)] À , [12] 2.48(3) in [(C 5 H 5 ) 3 U{CH 3 C(CH 2 ) 2 }], [13] 2.54 (2) in [(C 5 H 5 ) 3 U(p-CH 2 C 6 H 4 CH 3 )], [11] and 2.436(4) in [(Me 3 SiC 5 H 4 ) 3 U(CH CH 2 )]. [14] The five B atoms of the C 2 B 5 bonding face are almost coplanar, and the two C atoms are about 0.6 above this plane.…”

Structure of indenyluranium trichloride–bis(tetrahydrofuran), [U(C9H7)]Cl3.2C4H8O

“…The largest proportion of organouranium complexes whose molecular structures have been described in the literature are complexes of the cyclopentadienide ligand (Atwood, Hains, Tsutsui & Gebala, 1973;Bombieri, De Paoli, Delpra & Bagnall, 1978;Burns, 1974;Eigenbrot & Raymond, 1981;Ernst, Kennelly, Day, Day & Marks, 1979;Fischer, Klahne & Kopf, 1978;Leong, Hodgson & Raymond, 1973;Perego, Cesari, Farina & Lugli, 1975, 1976Wong, Yen & Lee, 1965). Only one structural determination has been reported for organouranium complexes of the indenide ligand (Burns & Laubereau, 1971).…”

Organoactinide chemistry: synthesis, structure, and solution dynamics

“…The benzyl anion has been used to isolate sufficiently stable organoactinide complexes of a wide variety; early reports of the synthesis of homoleptic actinide alkyls showed that the tetrakisbenzyl derivative of Th was relatively stable for brief periods of time at room temperature 31 • One of the first structurally characterized uranium carbon sigma bonds was in Cp 3 UCH 2 C 6 H~-p-Me 32 •…”