When acetaldehyde (CH₃CHO) is deprotonated, the resulting anion is stabilized by resonance. Draw the major resonance contributing forms of this anion.

Acetaldehyde

A colorless volatile compound with a pungent odor, used in the manufacture of acetic acid, perfumes, and flavors.

Deprotonated

Refers to the removal of a proton (H+) from a molecule, resulting in the formation of a negatively charged ion.

Resonance

A phenomenon in chemistry where a molecule or ion can be represented by two or more equivalent structures, indicating the delocalization of electrons.