View source for Phenylene group

{{Short description|Chemical group (–C6H4–); benzene with two substituents}}
{{distinguish|phenalene}}
[[Image:P-phenylene-group-2D-skeletal.png|thumb|right|The [[chemical structure]] of the ''para''-phenylene group.]]

In [[organic chemistry]], the '''phenylene group''' ({{chem2|\sC6H4\s}}) is based on a di-substituted [[benzene]] ring ([[arylene]]). For example, [[poly(p-phenylene)|poly(''p''-phenylene)]] is a [[polymer]] built up from ''para''-phenylene repeating units.<ref>p. C-9, Section 11.6, Handbook of Chemistry and Physics, 62nd Edition, 1981-1982, CRC Press</ref> The phenylene group has three [[structural isomer]]s, based on [[Arene substitution pattern|which hydrogens are substituted]]: ''para''-phenylene, ''meta''-phenylene, and ''ortho''-phenylene.
[[Image:Ortho-meta-para.svg|thumb|150px|right|Isomer naming convention]]

== References ==
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{{Commonscat}}

[[Category:Arenediyl groups]]
[[Category:Phenylene compounds| ]]

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