Nomenclature of alkenes practice

 NOMENCLATURE OF ALKENES PRACTICE

       Nomenclature of alkene (Alkenes are compounds that are made up of carbon and hydrogen and have a double bond along with a single bond.)

Common names

          In the past organic compounds were named on different basis:

In the past, alkenes are named in such a way that, their name end with –xylene.

Examples: ethylene, propylene, butylene, and pentylene.

IUPAC nomenclature of organic chemistry

    Alkenes are named according to IUPAC rules.

Alkenes nomenclature 

          There are many rules for the naming of alkanes which are as follow:

1.     Always select the longest chain of carbon atoms in the whole molecule, which contains a double bond, which is designated as the parent name of that compound. In alkene compounds, the name ends with –ene instead of –ane.

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2.     Always try to number the carbon atom chain from that side where double bond and substituents get the lowest possible number.

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3.     Represent the location of the double bond with the first number carbon of double as a prefix.

nomenclature of alkene

4.     Always mention the position of substituents by the number on the carbon atom chain.

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5.     If two or more substituents are present on the chain then each substituent is represented by its own number on the carbon atom chain. The representation of substituents follows the alphabetical rule.

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  If more than one double bonds are present in a compound then alkadienes for two, and alkatrienes for three, and so on.

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 If the same substituent is present more than one time on the carbon atom chain than we use prefixes di, tri, tetra, and so on. We also represent each substituent by its own number. The numbers in a name are separated by a comma. Substituents name and their position number is separated by dash (-).

 

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