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Chapter 20: Q60P (page 985)

Question:Draw the mechanism for the acid-catalyzed hydrolysis of β-maltose.

Short Answer

Expert verified

The mechanism is given below. Beta-maltose is attacked by hydrochloric acid. It is then followed by electron shift which forms glucose and H3O+ion.

Step by step solution

01

Attack of acid

Oxygen atom combining both glucose molecules is attacked by an acid, i.e. hydrochloric acid. There forms a positive charge on the oxygen atom and chloride ion is also formed.

02

Step 2: Electron shift

Electron shift occurs and maltose ring divides into two units. Among them, one is glucose molecule. Water molecule attacks the other molecule. Thus hydrolysis occurs in the molecule and forms glucose molecule andH3O+ ion. This mechanism of formation of glucose and H3O+ ion is given below:

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