Chem. Commun., 2025, Accepted Manuscript DOI: 10.1039/D5CC03765D, Communication Yan-Hao Wang, Hong-Yang Wan, Fu-Yan Xiao, Cheng-Pan Zhang The photocatalytic stereoselective trifluoromethylselenolation of E-arylalkenyl iodides with [Me4N][SeCF3] is described under different conditions. These reactions enabled the first controllable synthesis of arylalkenyl trifluoromethyl selenoethers in good yields and with...