10.1021/om5006676.s002 Jonathan C. Axtell Jonathan C. Axtell Richard R. Schrock Richard R. Schrock Peter Müller Peter Müller Stacey J. Smith Stacey J. Smith Amir H. Hoveyda Amir H. Hoveyda Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand American Chemical Society 2015 3C DCMNBD Tungsten Imido Alkylidene Complexes DBMP complex ArCl 2CF 2015-12-17 05:07:26 Journal contribution https://acs.figshare.com/articles/journal_contribution/Synthesis_of_Tungsten_Imido_Alkylidene_Complexes_that_Contain_an_Electron_Withdrawing_Imido_Ligand/2041743 Tungsten NAr<sup>R</sup> alkylidene complexes have been prepared that contain the electron-withdrawing Ar<sup>R</sup> groups 2,4,6-X<sub>3</sub>C<sub>6</sub>H<sub>2</sub> (Ar<sup>X3</sup>, X = Cl, Br), 2,6-Cl<sub>2</sub>-4-CF<sub>3</sub>C<sub>6</sub>H<sub>2</sub> (Ar<sup>Cl2CF3</sup>), and 3,5-(CF<sub>3</sub>)<sub>2</sub>C<sub>6</sub>H<sub>3</sub> (Ar<sup>(CF3)2</sup>). Reported complexes include W­(NAr<sup>R</sup>)<sub>2</sub>Cl<sub>2</sub>(dme) (dme = 1,2-dimethoxyethane), W­(NAr<sup>R</sup>)<sub>2</sub>(CH<sub>2</sub>CMe<sub>3</sub>)<sub>2</sub>, W­(NAr<sup>R</sup>)­(CHCMe<sub>3</sub>)­(OTf)<sub>2</sub>(dme), and W­(NAr<sup>R</sup>)­(CHCMe<sub>3</sub>)­(ODBMP)<sub>2</sub> (DBMP = 4-Me-2,6-(CHPh<sub>2</sub>)­C<sub>6</sub>H<sub>2</sub>). The W­(NAr<sup>R</sup>)­(CHCMe<sub>3</sub>)­(ODBMP)<sub>2</sub> complexes were explored as initiators for the polymerization of 2,3-dicarbomethoxynorbornadiene (DCMNBD).