After early studies by Wanzlick)'] the chemistry of stable carbenes underwent a revival in 1991 with the structural characterization of 1 (R= 1-adamantyl). Iz] Stable carbenes such as 1 are now easily accessible and show a rich reaction chemistry.["] Computational studies have confirmed that carbenes of type 1 possess aromatic~ tabilization.[~] The numerous aromatic carbenes 1 currently have only two nonaromatic counterparts, compounds 2f61 ...