Question #5a8f3

1 Answer
Ernest Z.
Jan 21, 2017

The dipole moment of a ketone is greater than that of an aldehyde.

Explanation:

The polar #"C=O"# bond is responsible for most of the dipole moment of aldehydes and ketones.

Thus, the dipole moment of formaldehyde, #"H"_2"C=O"#, is 2.3 D.

An alkyl group is electron donating, and the dipole moment of acetaldehyde, #"CH"_3"CH=O"#, increases to 2.5 D.

Dipole moments

Acetone, #("CH"_3)_2"C=O"# has two methyl groups donating electrons, and its dipole moment is even larger at 2.9 D.

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