A Lead(II) Substituted Triplet Carbene.

ABSTRACT: Reaction of the pincer-type ligand L₃ supported complex [L₃PbBr][BArF₂₄] (1) with Li[(C(═N₂)TMS)] furnishes [L₃Pb(C(═N₂)TMS)][BArF₂₄] (2). Diazo-compound 2 eliminates dinitrogen upon irradiation affording formal plumba-alkyne 3, which persists in cold fluoroarene solutions. Variable temperature UV/Vis and NMR spectroscopies in combination with quantum-chemical calculations identify 3 as a metal-substituted triplet carbene. In-crystallo irradiation of [L₃Pb(C(═N₂)TMS)(tol)][BArF₂₄] (2·tol) provides a snapshot of intermolecular C-H bond insertion with toluene (4).

SUBMITTER: Dankert F 

PROVIDER: S-EPMC11528407 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature