Difference between norrish type 2 and mclafferty
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A Norrish type II reaction is the photochemical intramolecular abstraction of a γ-hydrogen (a hydrogen atom three carbon positions removed from the carbonyl group) by the excited carbonyl compound to produce a 1,4-biradical as a primary photoproduct.[7] Norrish first reported the reaction in 1937.[8]
Secondary reactions that occur are fragmentation to form an enol and an alkene, or intramolecular recombination of the two radicals to a substituted cyclobutane (the Norrish–Yang reaction).[9]
The McLafferty rearrangement is a reaction observed in mass spectrometry. It is sometimes found that a molecule containing a keto-group undergoes β-cleavage, with the gain of the γ-hydrogen atom. This rearrangement may take place by a radical or ionic mechanism.
A Norrish type II reaction is the photochemical intramolecular abstraction of a γ-hydrogen (a hydrogen atom three carbon positions removed from the carbonyl group) by the excited carbonyl compound to produce a 1,4-biradical as a primary photoproduct.[7] Norrish first reported the reaction in 1937.[8]
Secondary reactions that occur are fragmentation to form an enol and an alkene, or intramolecular recombination of the two radicals to a substituted cyclobutane (the Norrish–Yang reaction).[9]
The McLafferty rearrangement is a reaction observed in mass spectrometry. It is sometimes found that a molecule containing a keto-group undergoes β-cleavage, with the gain of the γ-hydrogen atom. This rearrangement may take place by a radical or ionic mechanism.
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