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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: AussieKenDoll on September 09, 2020, 10:45:53 AM

Title: Woodward feaser rules subsstituent -CH(CH3)2 value?
Post by: AussieKenDoll on September 09, 2020, 10:45:53 AM

This is a homoannular diene,
Homoannular dinene = 253 nm
Exocyclic double bond = 5 nm
Ring residues = 3 * 5 nm

What should I do with the substituent marked with green circle! Should I consider it as a alkyl or what? What is the value of it?

Title: Re: Woodward feaser rules subsstituent -CH(CH3)2 value?
Post by: AWK on September 09, 2020, 02:16:15 PM

Woodward-Fieser
https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_(Organic_Chemistry)/Spectroscopy/Visible_and_Ultraviolet_Spectroscopy/Empirical_Rules_for_Absorption_Wavelengths_of_Conjugated_Systems

https://www.youtube.com/watch?v=K-Zg4C4FYPs