Thorium Mono- and Bis(imido) Complexes Made by Reprotonation of cyclo-Metalated Amides

Nicola L. Bell, Laurent Maron, Polly L. Arnold

Research output: Contribution to journalArticlepeer-review


Molecules containing actinide–nitrogen multiple bonds are of current interest as simple models for new actinide nitride nuclear fuels, and for their potential for the catalytic activation of inert hydrocarbon C–H bonds. Complexes with up to three uranium–nitrogen double bonds are now being widely studied, yet those with one thorium–nitrogen double bond are rare, and those with two are unknown. A new, simple mono(imido) thorium complex and the first bis(imido) thorium complex, K[Th(═NAr)N″3] and K2[Th(═NAr)2N″2], are readily made from insertion reactions (Ar = aryl, N″ = N(SiMe3)2) into the Th–C bond of the cyclometalated thorium amides [ThN″2(N(SiMe3)(SiMe2CH2))] and K[ThN″(N(SiMe3)(SiMe2CH2))2]. X-ray and computational structural analyses show a “transition-metal-like” cis-bis(imido) geometry and polarized Th═N bonds with twice the Wiberg bond order of the formally single Th–N bond in the same molecule.
Original languageEnglish
Pages (from-to)10492-10495
Number of pages4
JournalJournal of the American Chemical Society
Issue number33
Early online date12 Aug 2015
Publication statusPublished - 26 Aug 2015


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