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. Author manuscript; available in PMC: 2012 Jul 5.
Published in final edited form as: Angew Chem Int Ed Engl. 2011 Jan 5;50(7):1673–1677. doi: 10.1002/anie.201005352

Figure 4.

Figure 4

Linear free-energy relationship (Hammett study) for NHC-catalyzed redox reaction with para-substituted ynals: ρ = − 0.69 (Z = CF3, Cl, H, Me, or OMe as indicated in the plot). γ= −0.6901 x+0.0326, R2= 0.903.