Q. $\ \ \ \ CH_{3}$ $\ \ |$ The compounds $CH_{3} - C = CH - CH_{3}$ on reaction with $NalO_{4}$ in the presence of $KMnO_{4}$ gives
A) $CH_{3}COCH_{3}$
B) $CH_{3}COCH_{3} + CH_{3}COOH$
C) $CH_{3}COCH_{3} + CH_{3}CHO$
D) $CH_{3}CHO + CO_{2}$
Explanation
(b)
An aqueous solution of sodium periodate and a trace of potassium permanganate is known as Lemieux reagent. The alkene is oxidized to $cis$-diol, which is cleaved by periodate to aldehydes and/or ketones. Aldehydes are further oxidized by $KMnO_{4}$to acids
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This is better for both determining the position of double bond and for preparing carbonyl compounds, because in this method, formaldehyde is usually obtained from terminal alkene, instead of producing $CO_{2}$ and water
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.