Fig. 2: Substrate scope of the homo-coupling reaction.

General conditions: 2 (2 × 0.1 mmol), NiCl₂ (0.03 mmol, 30 mol%), IMes∙HCl (0.03 mmol, 30 mol%), DBU (0.22 mmol, 2.2 equiv) and 1,4-dioxane (1.0 mL) at 100 °C for 24 h under an argon atmosphere, isolated yields. ^a Detected by GC-MS.