title: Participation of benzene hydrogen bonding upon anion binding.
abstract: A m-xylene-bridged imidazolium receptor, 1, has been designed and synthesized. The receptor 1 utilizes two imidazole (C-H)(+)- - -anion hydrogen bonds and one benzene hydrogen- - -anion hydrogen bond. The major driving force of complexation between the receptor 1 and anions comes from two imidazole (C-H)(+)- - -anion hydrogen bonds. However, both NMR experiments and ab initio calculations show that the benzene hydrogen attracts the anion guests, clearly indicating benzene (C-H)- - -anion hydrogen bonding. [reaction: see text]
authors.affiliation: Department of Applied Chemistry, Sejong University, Seoul 143-747, Korea.
authors.forename: Sungjae
authors.initials: S
authors.lastname: In
authors.forename: Seung Joo
authors.initials: SJ
authors.lastname: Cho
authors.forename: Kyu Hwan
authors.initials: KH
authors.lastname: Lee
authors.forename: Jongmin
authors.initials: J
authors.lastname: Kang