Triglycerides (which make up cooking oils) tend to become rancid with time as they react with oxygen. This occurs because the triglyceride molecule reacts with oxygen to form carbon-centered radicals, which can create a chain reaction resulting in chemical cross-links between lipid chains. Oxygen (02) can exist as a diradical species and can do a hydrogen abstraction reaction. R represents the rest of the triglyceride OR oleic acid OR linoleic acid structure. Draw the Lewis structure for dioxygen (0,) and draw a resonance structure of dioxygen in its diradical form: Draw a hydrogen abstraction reaction of diradical oxygen with oleic acid (a monounsaturated fatty acid). Which hydrogen(s) is(are) most easily abstracted? Why?

a) Draw the ring-flip isomer of the molecule from question (b) Show which of the two is favored in the equilibrium between them, and explain why, showing all possible forms of strain in each of the isomers. (c） What is the stereochemical relationship between the two isomers? (d) Draw another stereoisomer of the molecule and show all the strains it contains.（strains is the most important one in this questuon！！！）

Please correct answer and don't use hend raiting

Deuterium (D) is an isotope of H. Both D and H have one proton and one electron; H has no neutrons and D has one. Consequently, D and H have nearly identical behavior, but they can be distinguished from each other experimentally due to their different masses. Therefore, replacing an H with a D in a molecule-deuterium isotope labeling-can provide valuable information about a mechanism. With this in mind, how would you synthesize each of the following deuterium-labeled compounds from the analogous unlabeled compound, using D,0 as your only source of deuterium? Hint: You will have to use two separate proton transfer reactions to synthesize each one. (a) (b) (c) OD D.

Please don't provide handwritten solution ....

Complete the mechanism for the propagation cycle by providing the curved arrows. Please help solve for the 2nd step.