Complete the curved arrow mechanism for the reaction of 4-methylpentanenitrile and lialh4, followed by the addition of acid to g
1 answer:
The curved arrow mechanism for the reaction as described is as represented in the attached image.
<h3>Nitrile reduction by LiAlH4</h3>Nitriles, upon reaction with LiAlH4 can be converted to 1° amines.
Opon occurrence of this reaction, the hydride nucleophile attacks the electrophilic carbon in the nitrile to form an imine anion. Once stabilized by a Lewis acid-base complexation the imine salt can accept a second hydride to form a dianion.
On this note, the nitrile reduction of 4-methyl pentanenitrile and lialh4, followed by the addition of acid to give the major product is as represented in the attached image.
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Answer:
Option b. Sodium chloride.
Explanation:
Consider the dissociation equilibrium of in water:
.
By the Le Chatelier's Principle, increasing the concentration of either product will shift the equilibrium to the left. Some that was initially dissolved will precipitate out of the solution. This effect is called the common-ion effect.
For this solution, the products of dissociation are
ions, and
ions.
Adding either to the solution will trigger the common-ion effect and reduce the solubility of .
In the two choices,
- Sodium chloride
will add
and
- Sodium fluoride
will add
ions to the solution.
contains
ions. It is capable of triggering the common-ion effect. However
contains neither
ions nor
ions. It will not trigger the common-ion effect.