A boryl-isodiazomethyl anion featuring a bent eneyne-type B=N–N≡C scaffold is isolated and structurally characterized. The highly nucleophilic boron-bound nitrogen centre makes this species an effective synthon of boryl-nitrene for concerted CN−/CO exchange and metathesis reactions with C=O, C=S and C=N bonds via cleavage of the N–N bond.
- Hongyu Wang
- Jiancheng Li
- Liu Leo Liu