Propyl
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2008-06-25T15:31:12Z
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In [[organic chemistry]], '''propyl''' is a three-[[carbon]] [[alkyl]] substituent with [[chemical formula]] '''-[[Carbon|C]]<sub>3</sub>[[Hydrogen|H]]<sub>7</sub>'''. It is the substituent form of the [[alkane]] [[propane]].
For example:
[[Image:Propyl ethanoate.png|thumb|center|Propyl ethanoate, also called propyl [[acetate]].]]
This is '''[[propyl ethanoate]]''', an [[ester]]. The propyl group is attached to the molecule after the middle oxygen.
There are two [[isomer]]ic forms of propyl:
* with the substituent attached to one of the end carbons (called prop-1-yl in the [[IUPAC nomenclature]], or '''n-propyl''' (Pr-n) in the old naming system); and
* with the substituent attached to the middle carbon (called prop-2-yl in the IUPAC system, or [[isopropyl]] in the old system).
In addition there is a third, cyclic, form called cyclopropyl, or '''c-propyl'''. It is not isomeric with the other two forms, having the chemical formula '''-[[Carbon|C]]<sub>3</sub>[[Hydrogen|H]]<sub>5</sub>'''.
[[Image:Propyl groups.png|thumb|600px|right|From left to right: the two isomeric groups prop-1-yl and prop-2-yl, and the non-isomeric cyclopropyl group.]]
== Examples ==
* [[isopropyl alcohol]]
== See also ==
* [[methyl]]
* [[Ethyl group|ethyl]]
* [[butyl]]
* [[pentyl]] / [[amyl]]
[[Category:Functional groups]]
[[it:Propile]]
[[pl:Grupa propylowa]]
[[ru:Пропил]]
[[sv:Propylgrupp]]
[[zh:丙基]]