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Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand.

ABSTRACT: Tungsten NArR alkylidene complexes have been prepared that contain the electron-withdrawing ArR groups 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)2 complexes were explored as initiators for the polymerization of 2,3-dicarbomethoxynorbornadiene (DCMNBD).

SUBMITTER: Axtell JC 

PROVIDER: S-EPMC4195510 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature

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Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand.

Axtell Jonathan C JC   Schrock Richard R RR   Müller Peter P   Smith Stacey J SJ   Hoveyda Amir H AH  

Organometallics 20140917 19

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>)<su  ...[more]

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