title: Aryl-phenyl scrambling in intermediate organopalladium complexes: a gas-phase study of the Mizoroki-Heck reaction.
abstract: The intramolecular aryl-phenyl scrambling reaction within palladium-DPPP-aryl complex (DPPP=1,3-bis(diphenylphosphino)propane) ions was analyzed by state-of-the-art tandem MS, including gas-phase ion/molecule reactions. The Mizoroki-Heck cross-coupling reaction was performed in the gas phase, and the intrinsic reactivity of important intermediates could be examined. Moreover, linear free-energy correlations were applied, and a mechanism for the scrambling reaction proceeding via phosphonium cations was assumed.
authors.affiliation: Department of Chemistry, University of Cologne, Greinstrasse 4, 50939 Köln (Germany).
authors.forename: Lukas
authors.initials: L
authors.lastname: Fiebig
authors.forename: Nils
authors.initials: N
authors.lastname: Schlörer
authors.forename: Hans-Günther
authors.initials: HG
authors.lastname: Schmalz
authors.forename: Mathias
authors.initials: M
authors.lastname: Schäfer
keywords: NMR spectroscopy; cross-coupling; linear free-energy correlations; mass spectrometry; reaction mechanisms