Question

iupac name of this compound
but the answer in book is
3-(1-hydroxyethyl)-5-methylheptanal​

Answer 1

Explanation:

Nomenclature according to IUPAC system involves use of following terms:(i)Word root :The word root represents the number of C atoms in parent chain.No. of C atomW.R.No. of C atomW.R.1Meth8Oct2Eth9Non3Prop.10Dec4But11Undec5Pent12Dodec6Hex13Tridec7Hep(ii)Primary suffix :Primary suffix is used to indicate saturation or unsaturation in carbon chain.While writing name, primary suffix is added to word root.Nature of C chainPrimary suffix(1)Saturated C chainane(2)Unsaturated C chainC=CeneC

≡

Cyne2 C = Cdiene2 C

≡

Cdiyne(iii)Secondary suffix : Secondary suffix is used to indicate functional group in organic comp. It is added primary suffix by dropping its terminal "e".Prefix :The part of the name C appears before the word root is called prefix. Different prefixes areused for dif categories of group as:(a)

Alkyl groups:

CH

3

–CH

2

–CH

2

→

1-propylCH

3

–CH–CH

3

→

2-propylCH

3

–CH

2

–CH

2

–CH

2

→

1-ButylCH

3

–CH

2

–CH–CH

3

→

2-Butyl

233

CHCHCH|CH

−− →

2-Methyl-1-propyl(b)In IUPAC system,for nomenclature some groups are not considered as functional group buttreated as substituent. These functional group are always indicated by prefixes instead of secondary suffixes.–NO

2

Nitro–ORAlkoxy–ClChloro–BrBromo–IIodo–FFluoro–N=ONitroso–NO

2

Nitro=NDia

HOPE IT WILL HELP YOU:)