Propyl 599040 221670566 2008-06-25T15:31:12Z Puppy8800 5404759 iw 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]]