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. Author manuscript; available in PMC: 2019 Apr 13.
Published in final edited form as: Nat Rev Chem. 2018 Nov 30;3(1):15–34. doi: 10.1038/s41570-018-0059-x

Fig. 1 |. Relative abundance of the valence states of early transition metal organometallic complexes.

Fig. 1 |

Reduced early transition metal complexes become increasingly rare as one proceeds from group 5 to earlier groups and also from period 3 to period 5. Data adapted from REF26.