title: N-Heterocyclic olefin stabilized boron dication.
abstract: Boron mono- and di-cations featuring a nucleophilic N-heterocyclic olefin and the pentamethylcyclopentadienyl substituent have been prepared and structurally characterized. Experimental and theoretical investigations show that [η(5)-Cp*B-NHO](2+) is considerably more Lewis acidic than [η(5)-Cp*B-IMes](2+) due to the steric congestion imposed by the bent geometry of NHO around the central boron atom.
authors.affiliation: Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan. cwchiu@ntu.edu.tw.
authors.forename: Wan-Hua
authors.initials: WH
authors.lastname: Lee
authors.forename: Ya-Fan
authors.initials: YF
authors.lastname: Lin
authors.forename: Gene-Hsiang
authors.initials: GH
authors.lastname: Lee
authors.forename: Shie-Ming
authors.initials: SM
authors.lastname: Peng
authors.forename: Ching-Wen
authors.initials: CW
authors.lastname: Chiu