American Chemical Society
om700279c_si_004.cif (16.94 kB)

Factors Influencing Coordination versus Oxidative Addition of C−H Bonds to Molybdenum and Tungsten:  Structural and Spectroscopic Evidence That the Calixarene Framework Promotes C−H Bond Activation

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posted on 2020-04-03, 15:08 authored by Daniela Buccella, Joseph M. Tanski, Gerard Parkin
Mo(PMe3)6 and W(PMe3)42-CH2PMe2)H react with the diphenol CH2(ArMe2OH)2 (ArMe2 = C6H2Me2) to yield [κ22-CH2(ArMe2O)2]M(PMe3)3H2 (M = Mo, W), which possess agostic M−H−C interactions. NMR spectroscopic studies provide evidence that the tungsten compound is in facile equilibrium with the metalated trihydride [κ3-CH(ArMe2O)2]W(PMe3)3H3.