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. 2022 Sep 16;13(39):11623–11632. doi: 10.1039/d2sc02822k

Rate constant KX, relative rates log(kX/kH) with the σp scale on the para-arylsulfonyl site.

Subtituent k X k X/kH Log(kX/kH) σ p
OMe 1.388 1.2572 0.0994 −0.27
CH3 1.304 1.1812 0.0723 −0.17
H 1.104 — — —
F 1.008 0.9130 −0.0395 0.06
Cl 0.876 0.7935 −0.1005 0.23
CF3 0.656 0.5942 −0.2261 0.54