(Solved): 12. Mclafferty Rearrangement: McLafferty Rearrangement is observed when the atom at the g-position ...

12. Mclafferty Rearrangement: McLafferty Rearrangement is observed when the atom at the g-position has a proton that can migrate to the heteroatom bearing the radical cation. The cyclic movement of six electron creates a six-membered aromatic transition state that is thermodynamically favorable. McLafferty rearrangement produces two fragments like most mechanism we have seen thus far. However, unlike many others where the radical and the cationic charge gets separated in the product fragments, McLafferty products involve a neutral molecule and a radical cation fragment. McLafferty Rearrangement a. In the molecule shown above, is there more than one McLafferty rearrangement possible? If yes, show the mechanisms and the products of each. b. For the following spectra, identify the peaks originating from the acylium ion formation. Also, explore the possibility of McLafferty rearrangements and identify the resulting peak. Provide mechanisms for each identification. Rel. Intensity