Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand Jonathan C. Axtell Richard R. Schrock Peter Müller Stacey J. Smith Amir H. Hoveyda 10.1021/om5006676.s002 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). 2015-12-17 05:07:26 3C DCMNBD Tungsten Imido Alkylidene Complexes DBMP complex ArCl 2CF