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    NMR Splitting and Radical Mechanism

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    1. Knowing that Jac > Jab > Jbc how many lines (peaks) would be observed for Ha?

    2. Write the free radical mechanism for the following decomposition and give the formula for the two radical involved in the propagation steps of the following free radical reaction.

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    Solution Preview

    Characteristic complex coupling can occur in alkenes. Because of the restricted rotation about C=C bonds, the alkenyl (vinylic) H atoms of unsymmetrical alkenes are not equivalent (i.e. they are in unique chemical environments). As a result, they all couple with each other. In alkenes, trans coupling generally results in larger coupling constants (Jtrans = ...

    Solution Summary

    The solution clearly explains the rationale behind identifying NMR splitting and radical mechanism in question.