It is known that the radical reaction of the system diphenyl disulfide3diphenyl diselenide with acetylene derivatives occurs under UV irradiation and gives rise to thioselenation products, ie 1-phenylthio-2-phenylselenoethene [1]. Heating of dimethyl diselenide with alkynes yields 1, 2-bis (methylseleno) ethenes [2].
[Russell, Glen A.; Ngoviwatchai, Preecha; Tashtoush, Hasan I.; Pla-Dalmau, Anna; Khanna, Rajive K. Journal of the American Chemical Society, 1988 , vol. 110, # 11 p. 3530 - 3538]
