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Updated: Jan 22, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Monomeric thorium dihydrido complexes: versatile precursors to actinide metallacycles
Guorui Qin1, Yang Wang2, Xianghui Shi3
1State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625, Renmin Street, Changchun 130022, China. jhcheng@ciac.ac.cn and University of Chinese Academy of Sciences, Changchun Branch, Changchun, 130022, China.
Abstract:
The monomeric actinide dihydrido complex [(CpAr*)(Cp*)ThH2(THF)] (2) bearing the super-bulky penta-arylcyclopentadienyl (CpAr* = C5Ar*5, Ar* = 3,5-tBu2-C6H3) and pentamethylcyclopentadienyl (Cp* = C5Me5) ligands was obtained for the first time. Complex 2 underwent unique Th-H addition reactions with various unsaturated compounds to afford the corresponding five-membered metallacycles, including the first example of actinide metallacyclopentyne [(CpAr*)(Cp*)Th(PhCH-C[triple bond, length as m-dash]C-CHPh)] (4).
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