How will you prepare methoxyethane from sodium methoxide and Phenolphthalein from
phenol
Answers
Answer:
Methoxyethane, also known as ethyl methyl ether, is an ethyl group with a bonded methoxy. Methoxyethane is a colourless gaseous ether with a medicine-like odour. It is extremely flammable, and its inhalation may cause asphyxiation or dizziness. As a Lewis base, it can react with Lewis acids to form salts and reacts violently with oxidizing agents.
a) Preparation of Dimethyl ether (Methoxymethane) from methyl iodide :
When methyl iodide is heated with alcoholic sodium methoxide, it gives dimethyl ether.
CH
3
−O−Na + I−CH
3
Δ
CH
3
−O−CH
3
+ NaI
b) Methoxyethane from diazomethane :
When ethyl alcohol is treated with diazomethane in presence of fluoroboric acid, methoxyethane is fromed.
C
2
H
5
−OH + CH
2
N
2
Δ
HBF
4
C
2
H
5
−O−CH
3
+ N
2
↑