Skip to content

IUPAC Nomenclature

May 25, 2013

The Chemical or scientific names gives an accurate description of composition of chemical compound. No doubt the common name of many compounds is still in use but you must be aware about the chemical or systematic names of compounds. The latest way for systematic naming of compound is purposed by IUPAC in the form of a setup of rules.

There must be two things in a rational nomenclature system; first name should indicate the bonding of the carbon atoms in given compound (chains and rings) and second the name should identify and locate the presence of any functional groups in compound. Only the location of hydrogen is not necessary to assumed as it is a most common component of organic compounds.

Initially the arbitrary nomenclature created a lot problem in organic chemistry; therefore the IUPAC nomenclature system purposed a set of logical rules for systematic nomenclature of compounds.

With the knowledge of IUPAC nomenclature rules, one can write a unique name for every distinct compound. Similarly by using systematic name of compound, you can write structural formula of compounds.

There are three essential features in IUPAC name;

 The major chain or ring of carbon atoms found in the molecular structure indicates by using root or base.
 Functional groups present in molecule can be present in the compound.
 Names of substituent groups can be shown in compound.

IUPAC system mainly purposed the name of organic compounds which contain at least one carbon atom.

The systematic name of organic compound starts with selection and then naming of a parent structure. This base name or root name can be modified by prefixes, infixes and suffix depends upon the molecular structural of compound.

For some of the chemical compound, traditional names are widely used in industry and academic circles compare to systematic names. Such as acetic acid, benzene and pyridine is common name and used widely. Let’s do some IUPAC Nomenclature Practice. First starts with the discussion of naming of hydrocarbons. Hydrocarbons have no function group and only composed of carbon and hydrogen. Those hydrocarbon which have all C-H single bonds, are called as alkane.  For the naming of an alkane, first identify the longest parent chain and decide the root word for that. Write the appropriate root word with suffix –ane , give name AlKANE. If there is a double bond in hydrocarbon, -ane suffix replaced by –ene and named as ALKENE. While the presence of triple bond, replace the suffix –ane with –yne and named as ALKYNE.


From → Uncategorized

Leave a Comment

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: