Impact of NHC Ligand Conformation and Solvent Concentration on the Ruthenium-Catalyzed Ring-Closing Metathesis Reaction GattiMichele Vieille-PetitLudovic LuanXinjun MarizRonaldo DrinkelEmma LindenAnthony DortaReto 2009 Impact of NHC Ligand Conformation and Solvent Concentration on the Ruthenium-Catalyzed Ring-Closing Metathesis Reaction