1.3- Dimesitylimidazol-2-ylidene, stable adducts

The synthesis and characterization of Et2Zn adducts with nucleophilic carbenes see Carbene Complexes have been described. They are directly available and in good yields from a smooth reaction between Et2 Zn and stable carbenes (see Carbene Complexes such as 1,3-dimesitylimidazol-2-ylidene or l,3-di(l-adamantyl)imidazol-2-ylidene (equation 13). The solid-state structure of [Et2Zn l,3-di(l-adamantyl)imidazol-2-ylidene ] shows a zinc atom in a rather unusual trigonal planar arrangement, certainly due to a steric... 

The synthesis and X-ray crystal structures of some (p,i 2 T 5)-di5ofapentafulvalene derivatives of the [Mfri -COD)] (M = Ni, Pt) fragment, such as (20), have been reported263. The reaction of [M(ti -COD)21 (M = Ni, Pt) with the stable nucleophilic carbene 1,3-dimesitylimidazol-2-ylidene was reported M to form two-coordinate homoleptic bis(carbene) adducts. The X-ray structures of both nickel and platinum products were determined. 

---