title: A viable anionic N-heterocyclic dicarbene.
abstract: The first anionic N-heterocyclic dicarbene, polymeric [:C{[N(2,6-Pr(i)(2)C(6)H(3))](2)CHCLi(THF)}](n) 1, containing both normal (C2) and abnormal carbene (C4) centers in the same five-membered imidazole ring (III), has been prepared by lithiation of the imidazole monocarbene, :C{N(2,6-Pr(i)(2)C(6)H(3))CH}(2). The dicarbene nature of 1 was unambiguously demonstrated by the formation of the group 13 Lewis acid adducts (THF)(2)Li:C{[N(2,6-Pr(i)(2)C(6)H(3))](2)CHC(LA)}, where LA = AlMe(3) [2·(THF)(2)] and BEt(3) [3·(THF)(2)].
authors.affiliation: Department of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, USA.
authors.forename: Yuzhong
authors.initials: Y
authors.lastname: Wang
authors.forename: Yaoming
authors.initials: Y
authors.lastname: Xie
authors.forename: Mariham Y
authors.initials: MY
authors.lastname: Abraham
authors.forename: Pingrong
authors.initials: P
authors.lastname: Wei
authors.forename: Henry F
authors.initials: HF
authors.lastname: Schaefer
authors.forename: Paul v R
authors.initials: Pv
authors.lastname: Schleyer
authors.forename: Gregory H
authors.initials: GH
authors.lastname: Robinson