Abstract: This paper introduced the IUPAC revised nomenclature for radicals. We think the three Chinese terms used in hydrocarbon radical nomenclature named “亚基”,“次基” and “烯丙基” are defective, and suggested that “亚基”and “次基”, corresponding to suffixes “-ylidene”and “-ylidyne”, are replaced by “丿丨基”and“川基”, respectively, where “丿丨” is coined Chinese character specially used in chemical language and the correct systematic name“丙-2-烯基”takes the place of “烯丙基”. We also give examples to illustrate above-mentioned name changes.

Key words: nomenclature of organic chemistry, hydrocarbon radical