When acetylene is heated at 300C in Cu-tube, the product obtained is:
Correct answer: A. Benzene
- A. Benzene
- B. Thiophene
- C. Divinyl acetylene
- D. Xylene
Explanation
Acetylene on passing through red hot iron tube at 873K undergoes cyclic polymerization. Three of the acetylene molecules polymerise to form benzene. This is the best route for entering from aliphatic to aromatic compounds.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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