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3-phenylbenzene

I've been given the structure and it seems like they're referring phenyl as a benzene attached to the 3rd carbon of the other benzene. Could anyone explain why it's called a phenyl? or what is a phenyl?


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I have no idea why it is 3-phenylbenzene as opposed to just plain old phenylbenzene. The numbering is redundant/unnecessary.

A phenyl- is basically a functional group which is a benzene group. So a phenylbenzene is a benzene with a benzene attached (i.e. the phenyl).

A less confusing example could be: phenylethane. That's an ethane molecule with a benzene attached. (Note that you can also call it ethylbenzene)


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