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science(chem)

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UV

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

  • science(chem) -

    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.

  • science(chem) -

    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.

  • science(chem) -

    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.

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