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    (Original post by Natasha18))
    Hi using infrared spectroscopy how would you be able to determine an aldehyde is a specific aldehyde e.g. Hexanal?

    thank you

    xxx
    Ring strain and conjugation alters the resonance. Greater ring strain gives higher cm^-1 (this is due to rehybridisation of the bonds) whereas it is lowered when there is conjugation.
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    The best way to identify a specific compound with IR is to look at the so called 'fingerprint' region (below 1500cm-1) which is unique for each compound.
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    opps, forgot to say that it's the carbonyl stretch that is affected.
 
 
 
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