Fig. 1: Reactivity of carbon monoxide (CO) in transition and main group metal chemistry.

a Fundamental transformations of carbon monoxide in transition metal chemistry and b main group metal chemistry. c State of the art in photochemically-driven CO insertion/extrusion with main group complexes. UV = ultraviolet, Ph = phenyl, R = organic substituent, Ar = aryl, LED = light-emitting diode.