Triamidoamine-uranium(IV)-stabilized terminal parent phosphide and phosphinidene complexes

Benedict M. Gardner, Gábor Balázs, Manfred Scheer, Floriana Tuna, Eric J L McInnes, Jonathan McMaster, William Lewis, Alexander J. Blake, Stephen T. Liddle

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Reaction of [U(TrenTIPS)(THF)][BPh4] (1; Tren TIPS=N{CH2CH2NSi(iPr)3} 3) with NaPH2 afforded the novel f-block terminal parent phosphide complex [U(TrenTIPS)(PH2)] (2; U-P=2.883(2)?Å). Treatment of 2 with one equivalent of KCH 2C6H5 and two equivalents of benzo-15-crown-5 ether (B15C5) afforded the unprecedented metal-stabilized terminal parent phosphinidene complex [U(TrenTIPS)(PH)][K(B15C5)2] (4; UP=2.613(2)?Å). DFT calculations reveal a polarized-covalent UP bond with a Mayer bond order of 1.92. Straightforward deprotonation of the first f-block terminal parent phosphide complex and potassium abstraction results in the isolation of an unprecedented structurally authenticated metal-stabilized terminal parent phosphinidene complex. B15C5=benzo-15-crown-5 ether. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)4484-4488
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number17
Publication statusPublished - 22 Apr 2014


  • density functional calculations
  • multiple bonds
  • phosphides
  • phosphinidene
  • uranium


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