.sigma.-Bond metathesis for carbon-hydrogen bonds of hydrocarbons and Sc-R (R = H, alkyl, aryl) bonds of permethylscandocene derivatives. Evidence for noninvolvement of the .pi. system in electrophilic activation of aromatic and vinylic C-H bonds
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W. Schaefer | B. Santarsiero | M. Thompson | J. Bercaw | S. Baxter | M. C. Nolan | A. R. Bulls | B. J. Burger | W. P. Schaefer | S. M. Baxter