dimethylsulfide; rose bengal 1.) EtOH, hν, 2.5, 2.) benzene, 0 deg C, 12 h; Yield given. Multistep reaction. Further byproducts given. Yields of byproduct given;

dimethylsulfide; methylene blue 1.) hν, 2.5, 2.) benzene, 0 deg C, 12 h; Yield given. Multistep reaction. Yields of byproduct given;