An air-stable N-heterocyclic carbene iminoxyl borate radical zwitterion†
A remarkably stable radical zwitterion derived from N-heterocyclic carbene nitric oxide and B(C6F5)3 is reported. The presented radical was generated by steric and electronic protection of the nitric oxide moiety using B(C6F5)3, which secured its stability toward air and moisture. An analogous yet less stable radical derived from C(C6H5)3+ is also synthesized and characterized.
- This article is part of the themed collections: Celebrating the 75th Anniversary of the Korean Chemical Society (KCS) and 2018 Emerging Investigators