In organic chemistry, isopropyl is a propyl with a group attached to the secondary carbon. If viewed as a functional group an isopropyl is an organic compound with a propyl group attached at its secondary carbon.The bond is therefore on the middle carbon.
In IUPAC nomenclature the group isopropyl is denoted with the prefix propan-2-yl. For example, isopropyl acetate is named propan-2-yl acetate. Shorthand notations for this alkyl are i-Pr,iPr, or Pri (some care has to be taken when using the abbreviation 'Pr', as it is the same as for the chemical element praseodymium).