# Why do the two methylene protons in ethylbenzene have a chemical shift at 2-2.9?

The data sheet does not have any chemical shifts in this range for compounds containing only carbon and hydrogen

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• Organic chemists use a number of abbreviations that look like element symbols. For example, $\ce{Ar}$ is aryl and $\ce{Ac}$ is acetyl, even though those symbols also stand for argon and actinium. We feel like we can get away with this because there are currently no known compounds with carbon-argon and carbon-actinium bonds. Feb 25 '15 at 20:58