Product formed when 2-pentyne reacts with ozone in the absence of Zinc is __________?
Correct answer: C. CH3CH2COOH + CH3COOH
- A. CH3CH2CHO + CH3CHO
- B. CH3CH2CHO + CH3COOH
- C. CH3CH2COOH + CH3COOH
- D. CH3COOH + CO2
Explanation
In oxidative ozonolysis without zinc, 2-pentyne, CH3-C≡C-CH2CH3, is cleaved at the triple bond and both resulting fragments are oxidised to carboxylic acids. The methyl side gives ethanoic acid, CH3COOH, while the ethyl side gives propanoic acid, CH3CH2COOH. The likely mistake is choosing aldehydes, which are formed in reductive ozonolysis with zinc rather than under oxidative conditions.
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About Alkynes
Alkynes are unsaturated hydrocarbons containing a carbon-carbon triple bond, with sp-hybridised carbon atoms and a linear arrangement around the bond. The content includes nomenclature, preparation, acidity of terminal alkynes, and addition reactions with hydrogen, halogens, hydrogen halides and water, as well as oxidation.
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