title: Elusive Antimony-Centered Radical Cations: Isolation, Characterization, Crystal Structures, and Reactivity Studies.
abstract: One-electron oxidation of the stibines Aryl3Sb (1, Aryl=2,6-iPr2-4-OMe-C6H2; 2, Aryl=2,4,6-iPr3-C6H2) with AgSbF6and NaBArylF4(ArylF=3,5-(CF3)2C6H3) afforded the first structurally characterized examples of antimony-centered radical cations 1.+[BArylF4]-and 2.+[BArylF4]-. Their molecular and electronic structures were investigated by single-crystal X-ray diffraction, electron paramagnetic resonance spectroscopy (EPR) and UV/Vis absorption spectroscopy, in conjunction with theoretical calculations. Moreover, their reactivity was investigated. The reaction of 2.+[BArylF4]-and p-benzoquinone afforded a dinuclear antimony dication salt 32+[BArylF4]2-, which was characterized by NMR spectroscopy and X-ray diffraction analysis. The formation of the dication 32+further confirms that the isolated stibine radical cations are antimony-centered.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Houjia
authors.initials: H
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Fang
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Chen
authors.affiliation: School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, 223300, China.
authors.forename: Zaichao
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Gengwen
authors.initials: G
authors.lastname: Tan
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
authors.forename: Xinping
authors.initials: X
authors.lastname: Wang
keywords: DFT calculations; EPR; antimony; radical cations; stibine