Abstract
Oxidative addition of the C–H bond at the 2-position of N-(2-pyridyl)imidazolium salts takes place to palladium(0) to lead to unexpected final products containing two carbenes. The formation of either cis or trans bis-carbene complexes, both identified by X-ray crystallography and spectroscopy, apparently is a consequence of the substitution pattern of the imidazolium moiety. A mechanism is suggested based on recent theoretical studies.
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