Beyond Takai´s Olefination Reagent: Persistent Dehalogenation Emerges in a Chromium(III)-µ3-Methylidyne Complex

Beyond Takai´s Olefination Reagent: Persistent Dehalogenation Emerges in a Chromium(III)-µ3-Methylidyne Complex
July 22, 2021 0 Comments

Reaction of CHI3 with six equivalents of CrCl2 in THF at low temperatures affords [Cr3Cl3(μ-Cl)3(μ3-CH)(thf)6] as the primary isolable high-yield CrIII μ3-methylidyne complicated. Substitution of the terminal chlorido ligands by way of salt metathesis with alkali-metal cyclopentadienides generates isostructural half-sandwich chromium(III)-μ3-methylidynes [CpR3Cr3(μ-Cl)3(μ3-CH] (CpR = C5H5, C5Me5, C5H4SiMe3). Side and decomposition merchandise of the Cl/CpR trade …