IUPAC name of the compound is
- 2, 3 – dimethylbut-2-ene
- 2, 3 – dimethyl butyne
- 1, 1, 2, 2 – tetra methylethene
- 2, 3 – dimethyl butene
The Correct Option is A
Approach Solution - 1
The structure \(\c{>C=C<}\) shows two double-bonded carbons, each directly connected to two alkyl substituents. For correct IUPAC nomenclature:
- Identify the longest carbon chain containing the double bond (four-carbon chain = "but-").
- Number the carbon chain giving the double bond the lowest possible number ("2-ene").
- Two methyl groups attached at carbons 2 and 3 give us the substituents "2,3-dimethyl".
This leads to the correct IUPAC name: 2,3–dimethylbut-2-ene.
Conclusion:
The correct answer is Option A: 2,3–dimethylbut-2-ene.
Approach Solution -2
The structure provided shows a compound with a double bond between two carbon atoms, and two methyl groups (\( \text{CH}_3 \)) attached to the second and third carbon atoms of a butene backbone.
- The longest chain in the compound is 4 carbons, which is butene.
- The double bond is at the second position, which is indicated by "but-2-ene".
- The methyl groups are attached to the second and third carbon atoms, making it "2, 3 - dimethyl".
Thus, the IUPAC name of the compound is 2, 3 - dimethylbut-2-ene.
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