title: Activation of a carbonyl compound by halogen bonding.
abstract: Using a prototypical Diels-Alder reaction as benchmark, we show that dicationic halogen-bond donors are capable of activating a neutral organic substrate. By various comparison experiments, the action of traces of acid or of other structural features of the halogen-bond donor not related to halogen bonding are excluded with high certainty.
authors.affiliation: Department Chemie, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany.
authors.forename: Stefan H
authors.initials: SH
authors.lastname: Jungbauer
authors.forename: Sebastian M
authors.initials: SM
authors.lastname: Walter
authors.forename: Severin
authors.initials: S
authors.lastname: Schindler
authors.forename: Laxmidhar
authors.initials: L
authors.lastname: Rout
authors.forename: Florian
authors.initials: F
authors.lastname: Kniep
authors.forename: Stefan M
authors.initials: SM
authors.lastname: Huber