Benzoquinone

Benzoquinone (C₆H₄O₂) is a quinone with a single benzene ring. There are 2 (out of 3 hypothetical) benzoquinones:

• 1,4-Benzoquinone, the more common isomer, right image (also para-benzoquinone, p-benzoquinone, para-quinone, or just quinone)
• 1,2-Benzoquinone, the less-common isomer, left image (also ortho-benzoquinone, o-benzoquinone, ortho-quinone)

• 1,3-benzoquinone itself does not exist^[1] though derivatives are known and have various potential applications.^[2]