title: Leaving group dependence of the rates of halogen-magnesium exchange reactions.
abstract: Relative reactivities and absolute rate constants of the reactions of haloarenes with i-PrMgCl·LiCl were investigated in THF at 0 °C. The rate of the halogen-magnesium exchange decreases in the series ArI > ArBr > ArCl (relative reactivities: 10(11):10(6):1). Preliminary experiments show that the p-tolylsulfinyl group is exchanged slightly faster than iodide, while a tosyl group is exchanged at least 10(4) times more slowly than a bromide.
authors.affiliation: The Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology , Harbin 150080, China, and Department Chemie der Ludwig-Maximilians-Universität München , Butenandtstrasse 5-13 (Haus F), München 81377, Germany.
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Chu
authors.forename: Paul
authors.initials: P
authors.lastname: Knochel
authors.forename: Herbert
authors.initials: H
authors.lastname: Mayr