Potential Precursors for Terminal Methylidene Rare-Earth-Metal Complexes Supported by a Superbulky Tris(pyrazolyl)borato Ligand.

ABSTRACT: A series of solvent-free heteroleptic terminal rare-earth-metal alkyl complexes stabilized by a superbulky tris(pyrazolyl)borato ligand with the general formula [Tp^tBu,Me LnMeR] have been synthesized and fully characterized. Treatment of the heterobimetallic mixed methyl/tetramethylaluminate compounds [Tp^tBu,Me LnMe(AlMe₄ )] (Ln=Y, Lu) with two equivalents of the mild halogenido transfer reagents SiMe₃ X (X=Cl, I) gave [Tp^tBu,Me LnX₂ ] in high yields. The addition of only one equivalent of SiMe₃ Cl to [Tp^tBu,Me LuMe(AlMe₄ )] selectively afforded the desired mixed methyl/chloride complex [Tp^tBu,Me LuMeCl]. Further reactivity studies of [Tp^tBu,Me LuMeCl] with LiR or KR (R=

SUBMITTER: Birkelbach VM 

PROVIDER: S-EPMC7687121 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature