Halogen Complexes of Anionic N-Heterocyclic Carbenes.

ABSTRACT: The lithium complexes [(WCA-NHC)Li(toluene)] of anionic N-heterocyclic carbenes with a weakly coordinating anionic borate moiety (WCA-NHC) reacted with iodine, bromine, or CCl₄ to afford the zwitterionic 2-halogenoimidazolium borates (WCA-NHC)X (X=I, Br, Cl; WCA=B(C₆ F₅ )₃ , B{3,5-C₆ H₃ (CF₃ )₂ }₃ ; NHC=IDipp=1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene, or NHC=IMes=1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene). The iodine derivative (WCA-IDipp)I (WCA=B(C₆ F₅ )₃ ) formed several complexes of the type (WCA-IDipp)I⋅L (L=C₆ H₅ Cl, C₆ H₅ Me, CH₃ CN, THF, ONMe₃ ), revealing its ability to

SUBMITTER: Frosch J 

PROVIDER: S-EPMC7986712 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature