title: Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand.
abstract: Tungsten NArRalkylidene complexes have been prepared that contain the electron-withdrawing ArRgroups 2,4,6-X3C6H2(ArX3, X = Cl, Br), 2,6-Cl2-4-CF3C6H2(ArCl2CF3), and 3,5-(CF3)2C6H3(Ar(CF3)2). Reported complexes include W(NArR)2Cl2(dme) (dme = 1,2-dimethoxyethane), W(NArR)2(CH2CMe3)2, W(NArR)(CHCMe3)(OTf)2(dme), and W(NArR)(CHCMe3)(ODBMP)2(DBMP = 4-Me-2,6-(CHPh2)C6H2). The W(NArR)(CHCMe3)(ODBMP)2complexes were explored as initiators for the polymerization of 2,3-dicarbomethoxynorbornadiene (DCMNBD).
authors.affiliation: Department of Chemistry 6-331, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
authors.forename: Jonathan C
authors.initials: JC
authors.lastname: Axtell
authors.affiliation: Department of Chemistry 6-331, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
authors.forename: Richard R
authors.initials: RR
authors.lastname: Schrock
authors.affiliation: Department of Chemistry 6-331, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
authors.forename: Peter
authors.initials: P
authors.lastname: Müller
authors.affiliation: Department of Chemistry 6-331, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
authors.forename: Stacey J
authors.initials: SJ
authors.lastname: Smith
authors.affiliation: Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States.
authors.forename: Amir H
authors.initials: AH
authors.lastname: Hoveyda