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Chemistry Forums for Students => Organic Chemistry Forum => Organic Spectroscopy => Topic started by: Charles Furman on May 22, 2015, 06:14:42 PM

Title: Ring Residue?
Post by: Charles Furman on May 22, 2015, 06:14:42 PM

What does it mean Ring Residue in UV spectroscopy? and How can I know it?

Title: Re: Ring Residue?
Post by: Corribus on May 23, 2015, 02:02:23 AM

It's occasionally encountered in the context of empirical methods to predict the absorption properties, particularly the maximum absorbance wavelength, of conjugated organic molecules. Essentially, it refers to an alkyl or other similar substituent that impacts the UV-Vis spectrum of a molecule. I imagine there's some historical reason why it's called a residue, but someone else will have to enlighten us on that score.