Solveeit Logo
Login

Question

Question: How many moles of iodomethane are consumed in the following conversion? $CH_3NH_2 \xrightarrow{CH_3...

How many moles of iodomethane are consumed in the following conversion?

CH3NH2→CH3I(CH3)4N+I−CH_3NH_2 \xrightarrow{CH_3I} (CH_3)_4 N^+ I^-

A

Four

B

Three

C

Two

D

One

Answer

Three

Explanation

Solution

Methylamine (CH₃NH₂) reacts with CH₃I in three successive alkylation steps:

  1. CH3NH2+CH3I→CH3NHCH3+HICH_3NH_2 + CH_3I \rightarrow CH_3NHCH_3 + HI

  2. CH3NHCH3+CH3I→(CH3)2NCH3+HICH_3NHCH_3 + CH_3I \rightarrow (CH_3)_2NCH_3 + HI

  3. (CH3)2NCH3+CH3I→(CH3)3NCH3+I−(CH_3)_2NCH_3 + CH_3I \rightarrow (CH_3)_3NCH_3^+ I^-

Thus, a total of 3 moles of iodomethane (CH₃I) are required.