title: An unusual equilibrium chlorine atom transfer process and its potential for assessment of steric pressure by bulky aryls.
abstract: An unusually facile intermolecular chlorine atom transfer process has been discovered between the phospha-Wittig reagents ArP=PMe3 and ArPCl2 (Ar is a sterically hindered aryl group). The atom transfer process is catalyzed by added PMe3. A mechanism is forwarded that is based upon a Me3P/Me3PCl2 couple that allows shuttling of chlorine atoms between ArP groups. This unique transfer process is exploited to evaluate the steric properties of aryl groups via an equilibrium process.
authors.affiliation: Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-7078, USA.
authors.forename: Rhett C
authors.initials: RC
authors.lastname: Smith
authors.forename: Shashin
authors.initials: S
authors.lastname: Shah
authors.forename: Eugenijus
authors.initials: E
authors.lastname: Urnezius
authors.forename: John D
authors.initials: JD
authors.lastname: Protasiewicz