Abstract
Novel N-heterocyclic carbene (NHC) complexes containing either a symmetric or an asymmetric (i.e. containing two different N-substituents) donor functionality and a 5- or 6-membered ring as backbone have been synthesized. These complexes have been synthesized by using the direct metallation method with Fe[HMDS]2 and the “free carbene method with LiHMDS.
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