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. 2024 Jan 23;29(3):569. doi: 10.3390/molecules29030569

Figure 45.

Figure 45

(a) Hydrogen sulfide (H2S/HS) affords the sulfhydryl radical (HS/S•−) by a variety of methods and adds reversibly to the parent compound to form the dimeric radical anion. (b) Dual catalytic/radical chain mechanism for the deoxygenation of cis-1,2-cyclopentanediol (22) to cyclopentanol 24) via cyclopentanone (23) in aqueous solutions (taken from Ref. [190]). (c) Dual radical chain mechanism for the deoxygenation of 2-hydroxycyclohexanone (29).