UV

Question

I was just wondering how a solvent would affect the spectra of a compound.

Like a polar or nonpolar solvent for example:
polar: Methylene chloride
Nonpolar: cyclohexane, hexane, or ethanol

Thanks

Answer 1

This may be just a hint of what you are looking for.
http://answers.yahoo.com/question/index?qid=20080621111634AAE3LO0
And I consider ethanol as somewhat polar, at least more polar than the other two solvents you list.

Answer 2

Yes I saw that. I thoroughly looked this up before I came here...
That doesn't tell me what will I see.
What does "Agregate," mean?

I found out what I needed, I think.

Thank you for looking, Dr.Bob.

Answer 3

There are corrections to Woodward's rules for solvents which would help here. These below are for the uv max of a conjugated carbonyl and are in nm.

water + 8
chloroform - 1
ether - 7
cyclohexane - 11
dioxane - 5
hexane - 11

so the lower polarity solvent shifts the maximum to a lower wavelength and the more polar solvent to a higher wavelength.