The IUPAC name of the given compound is :

3-ethylcyclobut-1-en-2-ol

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4-ethylcyclobut-2-en-1-ol

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2-ethylcyclobuten-3-1-ol

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4-ethylcyclobut-1-en-3-ol

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Solution

The correct option is C 4-ethylcyclobut-2-en-1-ol
The parent hydrocarbon is cyclobutane.

First carbon has a hydroxyl group as a substituent.

Fourth carbon has ethyl group as a substituent, the double bond is present between the second and third carbon atom.
Hence, the IUPAC name of given compound is 4-ethylcyclobut-2-en-1-ol

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Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
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(ii) 3,4-Dimethyl-hept-3-ene

(iii) 2-Ethylbut-1-ene

(iv) 1-Phenylbut-1-ene

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