The IUPAC name of CH2=CHCHOH-CH2CHO is 3-Hydroxy-pent-4-ene-1-al. Every organic compound has to follow the IUPAC nomenclature of organic compounds.
IUPAC nomenclature rules
- The longest hydrocarbon chain is selected and is termed as the parent chain in the case of alkanes.
- For alkanes suffix ‘-ane’ is used, for alkenes, suffix ‘-ene’ is used and suffix ‘yne’ is used for alkynes.
- The parent chain is numbered such that we reach the double-bonded or triple bonded carbon atom earliest.
- The position of the carbon atom with the double bond is mentioned in numerals.
- In the case of multiple double bonds in the carbon chain, Greek numerical prefixes such as di, tri are used to denote their number.
The IUPAC name of CH2=CHCHOH-CH2CHO
- The longest chain is with 5 carbon atoms.
- It is an alkene so the suffix used is ‘ene’ and the double bond is at 4th position.
- Hydroxyl group is present at third carbon and also the aldehyde group is present.
- Hence the name of the given compound is 3-Hydroxy-pent-4-ene-1-al.