CHM138H1 Chapter all: Aromatic Compounds
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CHM136H1 Full Course Notes
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Document Summary
Arenes are aromatic hydrocarbons with conjugated bonds in a ring. Monosubstituted benzenes are named using benzene as parent and the substituent as prefix (example, ethylbenzene and chlorobenzene) Some monosubstituted compounds have common names accepted by iupac. If the substituent has more than six carbons, treat the benzene ring as the substituent, called phenyl group (example, 1-phenylheptane). Phenyl groups in a structure are sometimes represented by the letters ph or greek letter phi ( ). Phenyl groups with substituents may be indicated by the letters ar (for aromatic ring). Xylenes are the dimethyl derivatives of benzenes; there are three constitutional isomers: The descriptors ortho, meta and para indicate relative positions of the groups. They can be combined with common parent names. Naming polysubstituted benzene rings follow the four-step procedure (parent, substituent, locant, alphabetical) Common name can be used as parent (example, 3,5-dibromophenol).
