Fig. 2.

Hammett plots of the quantitative structure-activity relationship for reduction of p-substituted benzaldehydes by SceADH2. The data are from Table 7, where V₂/E_t (●) and V₂/K_p (■) are plotted against the σ⁺ values for CH₃O-, CH₃-, H-, Cl-, Br- CN-, from left to right. and lines were calculated by linear regression with the following results.

$$\text{Log}(V_2/E_{\text{t}})=(1.89\pm 0.21){\sigma }^{+}+(1.34\pm 0.087),\text{F}=80.3,{\text{R}}^2=0.94$$

$$\text{Log}(V_2/K_{\text{p}})=(1.68\pm 0.39){\sigma }^{+}+(3.22\pm 0.16),\text{F}=18.4,{\text{R}}^2=0.79$$