How will you convert the following:
(a) Ethane to butane
(b) Ethyne to methane
(c) Ethene to Ethyne
(d) Methane to ethane
() Ethane to ethyne
Answers
Answer:
1) Ethane can be converted to Butane by the process of Wurtz Reaction. Wurtz reaction is the reaction in which the form of coupling reaction where two lower alkyl halides are reacted in the presence of a dry ether medium and sodium metal to form a higher alkane.
2) Acetylene combines directly with water in the presence of mercury(II) salts to give ethanal [acetaldehyde as you are still using old names] ...
This is readily oxidised to ethanoic acid [acetic acid] using acid dichromate. ...
Neutralise with NaOH and evaporate to dryness to heat gently to get anhydrous sodium acetate.
3) Ethane is characterized by the chemical formula .
It is made to react with in the presence of as catalyst.
The 2 atoms of Br attaches to the ethane and forms Dibromoethane.
It is then heated in the presence of alcoholic KOH.
This process yields ethyne as the end product.
4) To covert methane to ethane: Methane is treated with chlorine gas in the presence of ultraviolet light to form chloro methane. Chloro methane is treated with sodium metal and dry ether to form the product ethane. This process is also called Wrutz synthesis.
5) Ethane is characterized by the chemical formula .
It is made to react with in the presence of as catalyst.
The 2 atoms of Br attaches to the ethane and forms Dibromoethane.
It is then heated in the presence of alcoholic KOH.
This process yields ethyne as the end product.
Explanation:
a) First, there will be photochemical halogenation of the ethane.
CH3−CH3+Br2⟶CH3−CH2 −Br (in presence of light)
Second,
2CH3−CH2−Br ⟶Na/ether⟶CH3CH2−CH2-CH3 (Butane)