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Question

What would be the major product of the following reaction? Which of the following is true?

A
The degree of unsaturation in the major product is 1
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B
The degree of unsaturation in the major product is 3
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C
The degree of unsaturation in the major product is 4
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D
The exo double bond of the major product is cis
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Solution

The correct options are
B The degree of unsaturation in the major product is 3
D The exo double bond of the major product is cis

Lindlar’s catalyst selectively reduces the triple bond to a double with cis configuration. From the substrate, the double bond within the cyclopentene ring is unaffected. So the final product is:


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