Publications by authors named "Marie-Christine Boegli"
The adducts 2 of general formula trans-[(L)M{RP(CH)PR}{NB(CF)}] (L=ø or N, M=Mo or W, R=Et or Ph), formed from Lewis acid-base pairing of B(CF) to a dinitrogen ligand of zero-valent group 6 bis(phosphine) complexes trans-[M{RP(CH)PR}(N)] are shown to react with dihydrogen to afford hepta-coordinated bis(hydride) complexes [M(H){RP(CH)PR}{NB(CF)}] 3 which feature the rare ability to activate both dinitrogen and dihydrogen at a single metal center, except in the case where M=Mo and R=Ph for which fast precipitation of insoluble [Mo(H)(dppe)] (dppe=1,2-bis(diphenylphosphino)ethane) occurs. The frustrated Lewis pair (FLP)-related reactivity of the B-N linkage in compounds 3 was explored and led to distal N functionalization without involvement of the hydride ligands. It is shown in one example that the resulting bis(hydride) diazenido compounds may also be obtained through a sequence involving first FLP-type N-functionalization followed by oxidative addition of H.
View Article and Find Full Text PDFArticle Synopsis
- A Lewis superacidic bis(borane) CF{B(CF)} was used to create zwitterionic boryldiazenido W(ii) complexes by reacting with tungsten N-complexes.
- The complex [W(THF)(EtPCHCHPEt)(N{B(CF)CFB(CF)})] showed the capability to split hydrogen, resulting in a seven-coordinate complex that exhibits intriguing hydride storage properties.
- The study highlights a unique case where Lewis acid coordination modifies nitrogen activation, leading to a reduction of nitrogen to a diazene state, representing a novel approach in coordination chemistry.