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Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.
A Thorium Chalcogenolate Series Generated by Atom Insertion into Thorium-Carbon Bonds.
Journal of the American Chemical Society 2017 May 4
A new thorium monoalkyl complex, Th(CH2 SiMe3 )(L3 ) (L = MeC(Ni Pr)2 ) (2), undergoes insertion of chalcogen atoms resulting in a series of thorium chalcogenolate complexes, Th(ECH2 SiMe3 )(L3 ) (E = S, SS, Se, Te; 5-8). Complex 6 represents the first alkyl disulfide thorium species and illustrates the ability of 2 to undergo controllable, stoichiometric atom insertion. All complexes have been characterized by 1 H and 13 C NMR spectroscopy, FTIR, EA, and melting point, and in the case of 1, 2, and 4-8, X-ray crystallography. Insertion was achieved by balancing the thermodynamic driving force of chalcogenolate formation versus the BDE of the pnictogen-chalcogen bond in the transfer reagent. Utilizing Me3 NO as an oxygen atom transfer reagent led to C-H activation and SiMe4 extrusion rather than oxygen atom insertion, resulting in the alkoxide complex Th(OCH2 NMe2 )(L3 ) (4).
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