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Question

The IUPAC name of the compound CH2(COOH)2 is


A

Butanedioic acid

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B

Stearic acid

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C

Propane-1,3-dioic acid

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D

Propane-1,2-dioic acid

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Solution

The correct option is C

Propane-1,3-dioic acid


There are two O||COH or carboxylic acid groups . Both of them should get the lowest possible numbers. Hence there is only one way of numbering.


word root = prop
primary suffix = ane
secondary suffix = dioicacid
(since there are two carboxylic acid groups)
Hence the IUPAC name is :
propane -1, 3-dioicacid

Note : The word root 'prop'(-3 carbon atoms) is arrived at using carbon atoms which are part of the functional group.

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