## Yukawa–Tsuno equation

https://doi.org/10.1351/goldbook.Y06734
A multiparameter extension of the @[email protected] to quantify the role of enhanced @[email protected] on the reactivity of meta- and para-substituted benzene derivatives, e.g. $\log _{10}k = \log _{10}k_{0}+\rho \ [\sigma +r\ (\sigma^{+}-\sigma)]$ The parameter $$r$$ gives the enhanced @[email protected] on the scale ($$\sigma ^{+}\,-\sigma$$) or ($$\sigma\,-\sigma$$), respectively.