A reactive chemical group based on a six-membered carbon ring with two double bonds, important in organic chemistry reactions.
From cyclo- (ring) + hexa- (six, from Greek hex) + diene (two double bonds) + -yl (indicating a chemical group). Named systematically in 20th-century organic chemistry.
The cyclohexadienyl cation is famous in chemistry for being an intermediate in aromatic substitution reactions—it's like a temporary passport that molecules use when trying to modify benzene rings, one of nature's most stable molecules.
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