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. 2020 Nov 6;10(66):40421–40427. doi: 10.1039/d0ra08527h

Equilibrium constants of 3a/4a and 3b/4b in different solvents at 301 K.

d-solvent Dielectric constant (ε) K eq for 3a/4a K eq for 3b/4b
CDCl3 4.81 31.70 ± 0.49 22.87 ± 0.46
Acetone-d6 20.7 56.21 ± 0.13 32.05 ± 0.25
CD3CN 37.5 63.38 ± 0.75 40.14 ± 0.74
DMSO-d6 46.7 88.42 ± 0.40 38.06 ± 0.57