Table of Contents
- 1 What happens when acetophenone reacts with NaOH and i2?
- 2 Which of the following ketones do not react with i2 +NaOH?
- 3 Does acetophenone give iodoform reaction?
- 4 Which of the following will give yellow precipitate with i2 and NaOH?
- 5 How will you distinguish between acetophenone and benzophenone?
- 6 How do you convert acetophenone to benzophenone?
What happens when acetophenone reacts with NaOH and i2?
In this typical iodoform reaction, acetophenone (a methyl ketone) is treated with aqueous NaOH and I2 to produce sodium benzoate and iodoform. The yellow precipitate confirms the presence of the methyl ketone moiety in acetophenone.
Which of the following ketones do not react with i2 +NaOH?
Acetaldehyde, Acetone, and ethyl alcohol give iodoform tests due to the presence of $ – COC{H_3} $ the group. Therefore, propanol will not give an iodoform test and hence does not react with it $ {I_2}\& NaOH $ . Therefore, the correct option is (D).
What does i2 NaOH do in a reaction?
When iodine and sodium hydroxide are used as the reagents a positive reaction gives iodoform, which is a solid at room temperature and tends to precipitate out of solution causing a distinctive cloudiness.
Does acetophenone give Haloform reaction?
Write the reaction involved. Acetophenone (C6H5COCH3) contains the group CH3CO attached to carbon and hence gives iodoform test while benzophenone does not contain this group and hence does not give idoform test.
Does acetophenone give iodoform reaction?
Acetophenone (C6H5COCH3) contains the grouping (CH3CO attached to carbon) and hence given iodoform test while benzophenone does not contain this group and hence does not give iodoform test.
Which of the following will give yellow precipitate with i2 and NaOH?
CH3-CHO gives yellow precipitate with iodine and NaOH solution.
Which of the following ketone will not give yellow precipitate with NaOH i2?
The iodine and alkali like NaOH will react with each other to form NaOI. The Acetamide and Methyl acetate will not give yellow precipitate on reaction with Iodine and alkali.
Which of the following does not give yellow precipitate with i2 and NaOH?
How will you distinguish between acetophenone and benzophenone?
Acetophenone is a methyl ketone, whereas benzophenone is a phenyl ketone. Therefore, acetophenone gives a positive iodoform test by giving a yellow precipitate of iodoform with an alkaline solution of iodine. Whereas, benzophenone gives a negative test.
How do you convert acetophenone to benzophenone?
Now treat this benzoic acid with sodium hydroxide to get sodium salt of benzoic acid. Decarboxylation of sodium salt of benzoic acid in presence of soda lime will give us benzene. Benzene on freidal craft acylation with bezoyl chloride gives benzophenone as a product.