Scheme 7. Observation of Intra ET between the π*-orbital of R2 and the σ*(C–Br)-orbital with consequent bromine atom extrusion leading to benzophenone 8nb; reaction conditions: 1 (0.15 mmol), 2 (0.45 mmol), DMF (3 ml), K₂CO₃ (0.5 mmol), Eosin Y (7 mol%), 40 °C, green LEDs (1.25 W), 24 h, and argon flushing. The yields were determined by ¹H NMR.