Complex sentence: The reaction is mainly observed for complexes of metals with d 0 configuration, e.g. complexes of Zr (0), Nb (0), Ta (0), etc. f-Element complexes also participate, regardless of the number of f-electrons.
Split into simpler sentences: The reaction is mainly observed for complexes of metals with d 0 configuration, e.g. complexes of Zr (0), Nb (0), Ta (0). Complexes involving f-elements also participate, regardless of the number of f-electrons.