Question
Sat November 26, 2011 By:

can you please tell me the rules for writing the names of organic compound

Expert Reply
Mon November 28, 2011

Root name:

The basic carbon skeleton is indicated by the root name. 
These root names differ based on the number of carbons in main chain.
C1 = meth; C2 = eth; C3 = prop; C4 = buta; C5 = penta; C6 = hexa; C7 = hepta; C8 = octa; C9 = nona; C10 = deca.


Primary suffix:

A primary suffix is added to the root word to indicate the saturation or unsaturation in the carbon chain.

Name of Carbon Chain Primary Suffix Name

Saturated [C-C] -ane Alkane
Unsaturated [C=C] -ene Alkene
Unsaturated [C?C] -yne Alkyne


Secondary suffix:

A secondary suffix indicates the functional group present in the carbon compound. Usually the terminal ‘e’ of the primary suffix is replaced by the second suffix.

Functional group Secondary Suffix

Alcohol -ol
Aldehyde -al
Ketone -one
Carboxylic acid -oic acid

The group which contains one hydrogen less than the corresponding alkane is called as the alkyl group.
The group which contains one hydrogen less than the corresponding alkene is called as the alkenyl group. 
The group which contains one hydrogen less than the corresponding alkyne is called as the alkynyl group.

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