Dinuclear Palladium(III) Complexes with a Single Unsupported Bridging Halide Ligand: Reversible Formation from Mononuclear Palladium(II) or Palladium(IV) Precursors
作者:Julia R. Khusnutdinova、Nigam P. Rath、Liviu M. Mirica
DOI:10.1002/anie.201100928
日期:2011.6.6
Stable PdIII: Dinuclear PdIII complexes of the tridentate ligand trimethyltriazacyclononane (Me3tacn) were obtained by one‐electron oxidation of mononuclear PdII precursors. Further oxidation led reversibly to mononuclear PdIV species. The PdII and PdIII complexes are shown to be involved in the catalytic Kharasch addition of polyhaloalkanes to alkenes.
MECHANISM OF THE REACTIONS OF METHOXYCARBONYLCARBENE STUDIED BY CIDNP. IV. DOES NOT METHOXYCARBONYLCARBENE INSERT INTO THE C–Br BONDS OF BROMOMETHANES ?
The main products of the photochemical reactions of methyl diazoacetate with CBrCl3 and CBr2Cl2 have been unambiguously characterized as CCl3CHBrCO2CH3 and CBrCl2 CHBrCO2CH3, respectively. These results,together with the 1H and 13C CIDNP spectra,support the formation of these products by recombination of radical pairs (Remark: Graphics omitted.) which in turn are formed by preferential attack of carbene