@article {43613,
	title = {Isolation of a Perfectly Linear Uranium(II) Metallocene},
	journal = {Angewandte Chemie},
	volume = {132},
	year = {2020},
	month = {2020},
	pages = {2319 - 2323},
	publisher = {Wiley},
	abstract = {Reduction of the uranium(III) metallocene [(η 5 -C 5  i  Pr 5 ) 2 UI] ( 1 ) with potassium graphite produces the {\textquotedblleft}second-generation{\textquotedblright} uranocene [(η 5 -C 5  i  Pr 5 ) 2 U] ( 2 ), which contains uranium in the formal divalent oxidation state. The geometry of 2 is that of a perfectly linear bis(cyclopentadienyl) sandwich complex, with the ground-state valence electron configuration of uranium(II) revealed by electronic spectroscopy and density functional theory to be 5f 3 6d 1 . Appreciable covalent contributions to the metal-ligand bonds were determined from a computational study of 2 , including participation from the uranium 5f and 6d orbitals. Whereas three unpaired electrons in 2 occupy orbitals with essentially pure 5f character, the fourth electron resides in an orbital defined by strong 7s-6d  mixing.},
	author = {Guo, Fu-Sheng and Tsoureas, Nikolaos and Huang, Guo-Zhang and Tong, Ming-Liang and Mansikkam{\"a}ki, Akseli and Layfield, Richard A.}
}
