Quantification of the Nucleophilicities of 3-X-Thiophenes: Highlighting the Hyperortho Correlation

Figure 1

UV-visible spectrum of thiophene 1c and the progressive evolution of the formation of the product 4C in acetonitrile at 20°C with [1c] = 1 mol·L⁻¹ and [2a] = 5.10⁻⁵ mol·L⁻¹.