Problem: There are only four constitutional isomers with molecular formula  C4H9NO2 that contain a nitro group (–NO2). Three of these isomers have similar pKa values, while the fourth isomer has a much higher pKa value. Draw all four isomers and identify which one has the higher pKa. Explain your choice.

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There are only four constitutional isomers with molecular formula  C4H9NO2 that contain a nitro group (–NO2). Three of these isomers have similar pKa values, while the fourth isomer has a much higher pKa value. Draw all four isomers and identify which one has the higher pKa. Explain your choice.

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