An organic compound A reacts with PCl3 to give B. The compound B with sodium metal in thepresence of dry ether and gives n-butane. Thus, A and 𝐵 are:
Question
An organic compound A reacts with PCl3 to give B. The compound B with sodium metal in thepresence of dry ether and gives n-butane. Thus, A and 𝐵 are:
Solution
The compound A must be an alcohol because it reacts with PCl3 to give compound B. The only alcohol that reacts with sodium metal in the presence of dry ether to give n-butane is butyl alcohol. Therefore, compound A is butyl alcohol.
When butyl alcohol (A) reacts with PCl3, it forms butyl chloride (B). This is because PCl3 is a chlorinating agent that can replace the -OH group in an alcohol with a -Cl group.
So, compound B is butyl chloride. This compound reacts with sodium metal in the presence of dry ether to produce n-butane. This reaction is known as the Wurtz reaction, which is a coupling reaction where two alkyl halides react with sodium metal to form a higher alkane.
Therefore, compound A is butyl alcohol and compound B is butyl chloride.
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