Fig. 7. Estimated price (for one mmol in US dollars) of the catalysts in the selected range of –32.1/–23.0 kcal mol^–1 (for ligand no. 72–90). The price is calculated as a summation of the commercial price of transition metal precursors (one mmol) and one mmol of each ligand. The cheapest complex for each metal is shown on the right. The estimated price of all the 557 catalysts is detailed in the ESI.† .