Propyl group

In organic chemistry, a propyl group is a three-carbon alkyl substituent with chemical formula −CH2CH2CH3 for the linear form.This substituent form is obtained by removing one hydrogen atom attached to the terminal carbon of propane.[1] A propyl substituent is often represented in organic chemistry with the symbol Pr (not to be confused with the element praseodymium).[2] Linear propyl is sometimes termed normal and hence written with a prefix n- (i.e., n-propyl), as the absence of the prefix n- does not indicate which attachment point is chosen, i.e. absence of prefix does not automatically exclude the possibility of it being the branched version (i.e. i-propyl[citation needed] or isopropyl).[1][failed verification] In addition, there is a third, cyclic, form called cyclopropyl, or c-propyl[citation needed].
From left to right: the two isomeric groups propyl and 1-methylethyl (iPr or isopropyl), and the non-isomeric cyclopropyl group.
Chemical structure of propyl acetate.
organic chemistrycarbonsubstituentchemical formulapropanepraseodymiumisomericcyclopropyln-Propyl acetateacetateIsopropyl alcoholIsopropylamineFunctional groupsHydrocarbonsMethylPentylMethyleneBridgeMethineAlkene1-PropenylCrotylAlleneCumulenePhenylBenzylAlkyneCarbenehydrogenoxygenAcetalAlcoholAlkoxyMethoxyEnol etherEpoxidePeroxyHydroperoxyDioxiranesEthylenedioxyMethylenedioxycarbonylAcetylAcryloylBenzoylAldehydeKeteneKetoneReductoneCarboxylAcetoxyAnhydrideOrthoesterNitrogenEnamineAmmoniumHydrazoNitreneHydrazoneImidateAmidineCarbamateNitrileIsonitrileCyanateIsocyanateNitrateNitriteNitrosoNONOatePhosphorusPhosphatePhosphodiesterPhosphonatePhosphitePhosphonousPhosphinatePhosphine oxidePhosphinePhosphoniumPhosphaalkenePhosphaalkynePhosphaalleneSulfurSulfideSulfoniumPersulfideDisulfideSulfenic acidThiosulfinateSulfoxideThiosulfonateSulfinic acidSulfoneSulfonic acidThioketoneThioesterThionoesterThioxanthateXanthateBoronic acidBorinic acidSeleniumSelenolSelenonic acidSeleninic acidSelenenic acidSeloneTelluriumTellurolTelluroketoneHaloalkaneFluoroethylTrifluoromethylTrichloromethylTrifluoromethoxyHypervalent iodineVinyl halideIodideAcyl halideChloridePerchlorateIsothiocyanatePhosphoramidesSulfenyl chlorideSulfonamideThiocyanateSulfinylamineschemical classificationchemical nomenclatureinorganicorganic