N-Heterocyclic carbene-stabilized nitric oxide radicals were prepared by direct addition of nitric oxide to two N-heterocyclic carbenes in solution phase. The compounds were fully characterized by X-ray crystallography and EPR. The nitric oxide moiety in the solid compounds obtained can be thermally transferred to another N-heterocyclic carbene, suggesting potential applications to NO delivery.

This work describes polyester synthesis via alternating ring-opening copolymerization of epoxides and anhydrides using a trigonal bipyramidal chromium complex containing a sterically demanding ligand.