Palladium(II) agostic complex : exchange of Aryl–Pd and Alkyl–Pd bonds
Thomas, Helen R., Deeth, Robert J., Clarkson, Guy J. and Rourke, Jonathan P.. (2011) Palladium(II) agostic complex : exchange of Aryl–Pd and Alkyl–Pd bonds. Organometallics, Vol.30 (No.21). pp. 5641-5648. ISSN 0276-7333Full text not available from this repository.
Official URL: http://dx.doi.org/10.1021/om200451v
Cyclopalladation of 2-tbutyl-6-(4-fluorophenyl)pyridine with palladium acetate cleanly gives cyclometalated complex 3 with an aryl–Pd bond. Replacement of the acetates by chloride gives the monomeric species 4 with a crystal structure confirming the presence of an agostic interaction from the alkyl group. Reaction of 3 with Na(acac) initially gives the monomeric acac complex 5 which maintains the aryl–Pd bond. Complex 5 shows fluxional behavior of the acac group, and this provides a pathway for its isomerization to complex 6 which has an alkyl–Pd bond; complex 6 was characterized crystallographically. Reaction of agostic 4 with triphenylphosphine gives an initial complex that maintains the aryl–Pd bond, but this complex isomerizes to crystallographically characterized 8 which has an alkyl–Pd bond.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Faculty of Science > Chemistry|
|Library of Congress Subject Headings (LCSH):||Palladium, Transition metal complexes, Organometallic chemistry, Activation (Chemistry), Organic compounds -- Synthesis|
|Journal or Publication Title:||Organometallics|
|Publisher:||American Chemical Society|
|Page Range:||pp. 5641-5648|
(1) (a) Labinger, J. A.; Bercaw, J. E. Nature 2002, 417, 507.
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