Superoxide ion oxidizes aromatic thiols to disulfides or sulfonic acids. Benzene-1,2-dithiol and its
4-methyl analogue formed the cyclic disulfides dibenzo[c,g]tetrathiocins. Aliphatic thiols gave
disulfides, and ethane-1,2-dithiol and propane-1,3-dithiol formed the cyclic disulfides 1,2,5,6-
tetrathiocan and 1,2,6,7-tetrathiecan respectively. Butane-1,4-dithiol underwent an intramolecular
cyclization to 1,2-dithian. Cysteine was oxidized by O2-· to cysteic acid.
超氧离子可将芳香族硫醇氧化为二硫化物或磺酸。苯-1,2-二硫醇及其
4-甲基类似物形成环状二硫化物二苯并[c,g]四硫辛酸。脂肪族硫醇产生
二硫化物,乙烷-1,2-二硫醇和丙烷-1,3-二硫醇形成环状二硫化物 1,2,5,6-
和 1,2,6,7-Tetrathiecan 的环状二硫化物。1,2,5,6-四硫杂环烷和 1,2,6,7-四硫杂环烷。
环化成 1,2-二硫杂环。半胱氨酸被 O2 氧化成半胱氨酸。