Question

Which of the following reactions would not yield at least one aldehyde?

• A. Hydroboration of a terminal alkyne,followed by $H_2{O}_2/NaOH$
• B. Treatment of a monosubstituted alkene with ozone followed by $Zn/AcOH$
• C. Treatment of a termial alkyne with $KMn{O}_4/H^{+}$
• D. Treatment of 1-methylcyclopentene with ozone followed by Zn/AcOHZn/AcOH

Answer 1

Answer: (C)

Treatment of a termial alkyne with $KMn{O}_4/H^{+}$

Treatment of alkynes with $KMn{O}_4$ leads to carboxylic acids [terminal alkynes give carbonic acid, which decomposes to $C{O}_2$ and water].