Transition Metal Complexes of Diazenes, XXXVIII [1] Activation of Aromatic C-Cl Bonds in the Oxidative Addition of or^o-Chlorophenyldiazenes to Chlorotris(triphenylphosphine)rhodium
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چکیده
Refluxing a slightly acidic /?-BuOH solution of RhCKPPh,), and 2-chloro-, 2,4-dichloro-, or 2,4,6-trichloroazobenzene affords cyclometalated complexes (1) via loss of one phosphine ligand and oxidative addition of the ortho -C-Cl bond. X-ray structural analysis indicates a frcws-position of the two triphenylphosphine ligands. The reaction proceeds only in polar solvents like alcohols or dimethyl sulfoxide but not in toluene. In the presence of air or oxygen a hydrido complex was formed as a by-product.
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