Fig. 2
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Schematic diagram of the linear relationship between the enthalpy change and activation energy predicted by the Bell–Evans– Polanyi principle. While there are variations in each reaction, many of the reaction types considered in this study are shown to be broadly classified into two pairs of α−β (e.g., Michaelides et al. 2003; Wang et al. 2011; Sutton & Vlachos 2012), as illustrated with the red and blue regions.
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