Fig. 5: Experimental validation of the discovered reaction pathway.
a The formation of [BIMe(CH)2COOBu]+ ion was proven with ESI-HRMS; b the formation of [IPrCHC(Ph)COOBu]+ ion was proven with ESI-HRMS; c MS/MS spectrum of [IPrCHC(Ph)COOBu]+ ion; d vinyl-NHC and ethyl-NHC reaction products (Dipp – 1,3-diisopropylphenyl, Mes - mesityl).
