The univalent radical or group derived from benzene by removing one hydrogen atom, represented as C6H5-; also called phenyl.
From 'benzene' + '-yl' (chemistry suffix for univalent radicals or groups). This term became standard in organic chemistry nomenclature in the mid-1800s as chemists systematized the naming of molecular fragments.
Benzenyl (or phenyl) is like the 'handle' chemists grab onto when they want to attach benzene rings to other molecules—it's one of the most common building blocks in organic synthesis.
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