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Multiple Bonding in Lanthanides and Actinides: Direct Comparison of Covalency in Thorium(IV) and Cerium(IV) Imido Complexes.

著者 Cheisson T , Kersey KD , Mahieu N , McSkimming A , Gau MR , Carroll PJ , Schelter EJ
J Am Chem Soc.2019 May 22 ; ():.
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A series of thorium(IV)-imido complexes was synthesized and characterized. Extensive experimental and computational comparisons with the isostructural cerium(IV)-imido complexes revealed a notably more covalent bonding arrangement for the Ce=N bond compared with the more ionic Th=N bond. The thorium-imido moieties were observed to be three orders of magnitude more basic than their cerium congeners. More generally, these results provide unique experimental evidence for the larger covalent character of 4f05d0 Ce(IV) multiple bonds compared to its 5f06d0 Th(IV) actinide congener.
PMID: 31117665 [PubMed - as supplied by publisher]
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