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APPENDIX ORGANIC CHEMISTRY

  • Nomenclature of Organic Compound:

To Study of Organic Chemistry First we need to know the names of Organic Compound. In this page i can dealing with the name of organic compound, the systematic method of nomenclature and the IUPAC Nomenclature.

  • For Unsaturated Hydrocarbon:

  • 1. One method of nomenclature is to name of the olifin from the corresponding alkane by changing the suffix one of the latter into ylene .

  • As for Example:  

Methylene from MethaneEthylene from Ethane, Propylene From Propane etc.
Isomer differ only in the position of double bond are prefixed by Greek letter or number which indicates the position of double bond .
As for Example:
CH2=CH2   Ethylene

                               CH3CH2CH=CH2   1-butylene or α-butylene

  • 2.Another method of nomenclature is to consider ethylene as the parent substance and higher member is derivatives of ethylene.

If the compound is mono-substituted then no difficulty arises in naming but the compound is a di- substituted derivatives of ethylene isomerism is possible.
Since the alkyl groups are of attached same or different carbon atoms.
When the groups are attache to the same carbon atom of the olifins named as the the assymmertical compound.
When the groups are attache to the different carbon atom of the olifins named as the the symmertical compound.

  • Example:

CH2CH=CH2  methylethylene

CH3-CH2CH=CH2  ethylethylene

CH3C(CH₃)=CH2   as - dimethyleethylene
CH3-CH2 =CH-CH3    s - dimethyleethylene

  • 3. In IUPAC System also we can naming the organic compound. According to IUPAC system of nomenclature, the class of suffix of the olifin is -ene and so the series becomes alkene series.

  • Example:


CH2CH=CH2 → prop - 1 - ene
CH3-CH2CH=CH2 → but - 1 - ene
CH3C(CH3)=CH→ 2 - methylprop - 1 - ene
CH3-CH=CH-CH3 → but - 2 - ene