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The Feiser and Scott rules are empirical guidelines used to predict the wavelength of π − π* electronic transitions in conjugated carbonyl compounds, such as α,β-unsaturated ketones (enones) and aldehydes. These rules are particularly useful in UV spectroscopy for interpreting absorption maxima in polyenic and conjugated systems, _____ __________ ___ _______ _____ ________ ___ __________ __________ ___ _______ _____.
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