A boron-centered radical: a potassium-crown ether stabilized boryl radical anion. Issue 86 (29th September 2016)

• Record Type: Journal Article
• Authors: Yuan, Ningning; Wang, Wenqing; Wu, Ziye; Chen, Sheng; Tan, Gengwen; Sui, Yunxia; Wang, Xinping; Jiang, Jun; Power, Philip P.
• Is Part Of: Chemical communications. Volume 52:Issue 86(2016)
• Page Start: 12714
• Page End: 12716
• Publication Date: 2016-09-29
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc06918e
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : A boron radical contact ion-pair has been isolated, an intermediate stage between free radical anions and neutral radicals of boron. Abstract : A boron radical contact ion-pair Mes2 B{4-(3, 5-dimethylpyridinyl)}K(18-crown-6)(THF) (1K ) has been isolated and characterized by electron paramagnetic resonance (EPR) spectroscopy, UV-vis absorption spectroscopy and single crystal X-ray diffraction. The geometry, bonding and spin density distribution are shown to be affected by the N⋯K interaction. The unpaired electron resides mainly on the boron atom and falls between those of triarylboron radical anions and neutral boron radicals. The work provides a novel boron-centered radical intermediate, connecting anionic and neutral boryl radicals.