One reaction of this type is catalyzed by a complex containing a tungsten atom bonded to three tert-butoxy groups and triple bonded to a carbon atom.
One reaction of this type is catalyzed by a complex containing a tungsten atom bonded to three tert-butoxy groups and triple bonded to a carbon atom. That reaction of this type is also catalyzed using a mixture of resorcinol and molybdenum hexacarbonyl in the Montreux system. ADMET polymerization is based on this type of reaction. A catalyst for one type of this reaction is synthesized by reacting di-phenyl-cyclopropene with a complex containing two chlorine and two bulky phosphine ligands. One class of these reactions proceeds via a [2+2] cycloadditionbetween a transition metal alkylidene complex and an alkene to form a metalla-cyclobutane intermediate. That reaction of this type is catalyzed by a "first generation" catalyst based on ruthenium. For 10 points, name this type of reaction in which two molecules exchange substituents, whose "olefin" variety is aided by Grubbs' catalyst.
One reaction of this type is catalyzed by a complex containing a tungsten atom bonded to three tert-butoxy groups and triple bonded to a carbon atom.
metathesis [accept specific types like olefin  metathesis or alkyne  metathesis]