2024
DOI: 10.1002/ejic.202400108
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Electronic Effect of the [Au(PPh3)]+ Fragment in the Stabilization of Imidazolium Salts and the Destabilization of NHCs

Miguel A. Rosero‐Mafla,
Manuel N. Chaur,
Cesar A. Mujica‐Martinez
et al.

Abstract: This work presents the synthesis and characterization of mono (1) and di‐nuclear (2) imidazolium salts stabilized by [AuPPh3]+ fragments. The presence of the gold moiety induces a significant decrease in the carbenic proton's acidic character (high pKa). This high stability is consistent with the pronounced instability of the conjugate bases obtained through deprotonation using strong bases. The formation of carbene species is accompanied by the identification of a 1,2‐rearrangement process in which a preferen… Show more

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