title: The second step of the halogen/metal exchange reaction.
abstract: [reaction: see text] The conversion of the iodine ate-complex 5 to the Grignard reagent 6 follows a rate law first order in 5 and in magnesium ions. In addition to this normal pathway of the halogen-metal exchange process, the conversion of 5 to 6 is catalyzed by a number of diverse "electrophiles". This points to a SET-initiated radical chain process as a second pathway for the conversion of the iodine ate-complex 5 to the Grignard reagent 6.
authors.affiliation: Fachbereich Chemie der Philipps-Universität Marburg, D-35032 Marburg, Germany. rwho@chemie.uni-marburg.de
authors.forename: Reinhard W
authors.initials: RW
authors.lastname: Hoffmann
authors.forename: Mark
authors.initials: M
authors.lastname: Brönstrup
authors.forename: Michael
authors.initials: M
authors.lastname: Müller