Explain Woodward rules for predicting x-x* absorption in dienes. 

Woodward's rules provide a systematic approach for predicting the absorption wavelengths of conjugated dienes when they undergo electronic transitions. These transitions are specifically from the ground state (π) to the excited state (π*), also known as the π-π* transition. The absorption maximum, denoted as λmax, can be predicted using ___ __________ ___ _______ _______ _______ ______ __________ __________ _____.
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