title: Stable tetraaryldiphosphine radical cation and dication.
abstract: Salts containing tetraaryldiphosphine radical cation 1(•+) and dication 1(2+) have been isolated and structurally characterized. Radical 1(•+) has a relaxed pyramidal geometry, while dication 1(2+) prefers a planar, olefin-like geometry with a two-electron π bond. The alteration of the geometries of the tetraaryldiphosphine upon oxidation is rationalized by the nature of the bonding. The EPR spectrum showed that the spin density of radical 1(•+) is mainly localized on phosphorus atoms, which is supported by theoretical calculation.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Pan
authors.forename: Yuanting
authors.initials: Y
authors.lastname: Su
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Chen
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yizhi
authors.initials: Y
authors.lastname: Li
authors.forename: Jinglin
authors.initials: J
authors.lastname: Zuo
authors.forename: Xinping
authors.initials: X
authors.lastname: Wang