The recent development of the frustrated Lewis pair (FLP) chemistry for small molecule activation has also attracted several research groups to employ FLP to activate N 2 . Carbene-boron is one such FLP that has been recognized as a significant candidate for sequestering of N 2 . In 2019, Zhu et al. In this method, a pair of the same carbenes, as well as different carbenes, are equally effective for sequestering and complete conversion of SO 2 . From these two studies, it could be concluded that the use of persistent carbene pair may be more effective for small molecule activation and conversion.