title: "Naked" Lithium Cation: Strongly Activated Metal Cations Facilitated by Carborane Anions.
abstract: Experimental and spectroscopic studies revealed unprecedented reactivity of a "naked" lithium cation with very weakly coordinating anions, including carborane anions. The superactivated lithium cation has greatly enhanced Lewis acidic character and mediates various organic reactions such as carbonyl-ene reaction, NBS-bromination of unactivated aromatics, and Friedel-Crafts alkylation, which are not promoted by conventional lithium salts. Chemical robustness of the counteranion also plays an important role in the chemistry of the strongly activated lithium cation.
authors.affiliation: Graduate School of Pharmaceutical Sciences, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Kitazawa
authors.affiliation: Elements Chemistry Laboratory, RIKEN, and Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
authors.forename: Ryo
authors.identifier: 0000-0003-4104-9890
authors.initials: R
authors.lastname: Takita
authors.affiliation: Elements Chemistry Laboratory, RIKEN, and Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
authors.forename: Kengo
authors.initials: K
authors.lastname: Yoshida
authors.affiliation: Elements Chemistry Laboratory, RIKEN, and Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
authors.forename: Atsuya
authors.initials: A
authors.lastname: Muranaka
authors.affiliation: Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan.
authors.forename: Seijiro
authors.initials: S
authors.lastname: Matsubara
authors.affiliation: Graduate School of Pharmaceutical Sciences, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.|Elements Chemistry Laboratory, RIKEN, and Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science (CSRS) , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
authors.forename: Masanobu
authors.initials: M
authors.lastname: Uchiyama