Scheme 1.
Mechanism of linoleic acid (per)oxidation by SLO is initiated by a rate-determining hydrogen abstraction of pro-S hydrogen at carbon-11 (C11). Both the C-H abstraction and subsequent O2 insertion are associated with PCET processes. Select carbons are numbered for reference. In WT SLO, O2 insertion is site-selective at carbon-13. The DAD relevant to this study is between C11 of LA and oxygen from the metal-bound hydroxide.