title: Triamidoamine-uranium(IV)-stabilized terminal parent phosphide and phosphinidene complexes.
abstract: Reaction of [U(Tren(TIPS) )(THF)][BPh4 ] (1; Tren(TIPS) =N{CH2 CH2 NSi(iPr)3 }3 ) with NaPH2 afforded the novel f-block terminal parent phosphide complex [U(Tren(TIPS) )(PH2 )] (2; U-P=2.883(2) Å). Treatment of 2 with one equivalent of KCH2 C6 H5 and two equivalents of benzo-15-crown-5 ether (B15C5) afforded the unprecedented metal-stabilized terminal parent phosphinidene complex [U(Tren(TIPS) )(PH)][K(B15C5)2 ] (4; UP=2.613(2) Å). DFT calculations reveal a polarized-covalent UP bond with a Mayer bond order of 1.92.
authors.affiliation: School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD (UK).
authors.forename: Benedict M
authors.initials: BM
authors.lastname: Gardner
authors.forename: Gábor
authors.initials: G
authors.lastname: Balázs
authors.forename: Manfred
authors.initials: M
authors.lastname: Scheer
authors.forename: Floriana
authors.initials: F
authors.lastname: Tuna
authors.forename: Eric J L
authors.initials: EJ
authors.lastname: McInnes
authors.forename: Jonathan
authors.initials: J
authors.lastname: McMaster
authors.forename: William
authors.initials: W
authors.lastname: Lewis
authors.forename: Alexander J
authors.initials: AJ
authors.lastname: Blake
authors.forename: Stephen T
authors.initials: ST
authors.lastname: Liddle
keywords: density functional calculations; multiple bonds; phosphides; phosphinidene; uranium