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Question
Bring about the following conversionTrans-1,2-diphenyl ethylene →Cis−1,2−diphenylacetylene
Trans-1,2-diphenyl ethylene →Cis−1,2−diphenylacetylene
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Solution
A molecule of bromine is added to carbon carbon double bond in trans-1,2-diphenyl ethylene to obtain 1,2-dibromo-1,2-diphenylethane.
This is followed by dhydrobromination in presence of alc. KOH to obtain cis1,2diphenylacetylene.
This is followed by dhydrobromination in presence of alc. KOH to obtain cis1,2diphenylacetylene.
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