There are two types of prefixes: (1) Primary PrefixĪ primary prefix is used simply to distinguish cyclic from acyclic compounds.įor example : In case of carbocyclic compounds, a primary prefix, cyclo is used immediately before the word root.Ĭyclo(Primary prefix) + Pent (word root) + ane( Primary suffix) (2) secondary prefixĬertain groups are not considered as functional groups but instead are treated as substituents. (2) The locant 1 is often omitted when there is no ambiguity.ĬH 3CH 2CH 2NH 2 Propane-1-amine is often named as Propamine.ĬlCH 2CH 2OH 2-Chloroethan-1-ol is often named as 2-ChloroethanolĬH 3CH 2CH 2CHO Butan-1-al is often named as 2-Chloroethanol. (1) Locants are placed immediately before the part of the name to which they relate. While adding the secondary suffix to primary suffix ,the terminal e of the primary suffix is dropped if the secondary suffix begins with a vowel but is retained if the secondary suffix begins with a consonant. It denotes the number of carbon atoms present in the parent chain (the longest possible continuous chain of carbon atoms including the functional group and multiple bonds) of the organic molecule. The IUPAC name of any organic compound essentially consist of three parts ,i.e. The most important feature of this system is that any given molecular structure has only one IUPAC name and any given IUPAC name denotes only one molecular structure. General Rules for IUPAC Nomenclature of Organic Compounds To systematize the nomenclature of organic compounds, IUPAC system of nomenclature was first introduced in 1947. Common or Trivial names of some organic compounds: Compound
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