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Mass, IR and NMR spectroscopy

Exercise 1

Identify this substance!

IR spectrum

Mass spectrum

NMR spectrum

IR: $C=O$ band Mass: $CH_3CO^+$, $CH_3CH_2^+$,$CH_3CH_2CO^+$ NMR : - singulet: H atoms not coupled, - quadruplet: 3 neigbouring H atoms, - triplet: 2 neigbouring H atoms! It's butanone: $CH_3CH_2COCH_3$