Uploaded November 2021 | Updated September 2026, 2 weeks ago

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When you name benzene derivatives with 2 substituents, you'll often use ortho-, meta-, para- prefixes. This is how I remember them.

ortho- refers to a benzene ring with substituents in the 1 and 2 position, but it also means mouth.
meta- refers to a benzene ring with substituents in the 1 and 3 position. You can find the letter M in the structure.
para- refers to a benzene ring with substituents in the 1 and 3 position. The structure resembles a paraglider.

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