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Which bond functional group will make a benzene ring more polar: aldehyde or hydroxyl?

April 26, 2017benzene Bond Chemistry Functional group Mathematics ring

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Which bond functional group will make a benzene ring more polar: aldehyde or hydroxyl?

1 Answer

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Oxygen is much more electronegative of the hydroxyl group than the Carbon of the aldehyde. Since the benzene ring is a ring of electrons the Oxygen will cause unstability and therefore a larger dipole moment and charge difference. The hydroxyl group will cause more polarity.