6. Which of the following will not readily dehydrate to an alkene when heated wi
ID: 698574 • Letter: 6
Question
6. Which of the following will not readily dehydrate to an alkene when heated with 25% aqueous sulfuric acid? 7. How many experimentally distinguishable allylic carbons does the molecule to the right have?Please help! 5. What is the major isolated product of the following reaction? Na/NH3 (d) (E)/(Z) mixture of 3-hexenes 6. Which of the following will not readily dehydrate to an alkene when heated with 25% aqueous sulfuric acid? OH CH3 CHCH20% CH(OH)-C(CHs) CH(OH)CH(CH,)2 CH3 CH2CH2CH3 OH 7. How many experimentally distinguishable allylic carbons does the molecule to the right have? (a) Two(b) Three (c) Four (d) Five
Explanation / Answer
Ans 5 : (c)
The sodium metal gives off its electron and attacks the triple bond , forming a trans alkyl radical. Since the trans isomer is more stable than cis isomer, the trans alkene is formed as the product.
Ammonia is used as a solvent.
So trans-3-hexene is the major isolated product of the reaction.
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