The tungsten–carbene complex W(CHCMe3)(OCH2CMe3)2Br2, when mixed with GaBr3, adds various bicyclo[2.2.1]hept-2-enes to form ‘living’ propagating carbene complexes which may be characterized by 1H n.m.r. spectroscopy, and used to make block copolymers.
J. Kress, J. A. Osborn, R. M. E. Greene, K. J. Ivin and J. J. Rooney, J. Chem. Soc., Chem. Commun., 1985, 874 DOI: 10.1039/C39850000874
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