In summary, methyl viologen mediated EDA complexes provide an easily available and atom economical method for synthesizing cyclobutane and cyclohexene molecules under very mild conditions. This approach requires a catalytic amount of methyl viologen, which can be regenerated using air as the terminal oxidant. The process effectively inhibits back electron transfer without the need for leaving groups, further improving atom economy. Additionally, the reaction is tolerant to atmospheric conditions and utilizes environmentally friendly visible light for irradiation, making it both efficient and sustainable.