Question

Please help me with these!

Answer 1

• i. Write the reaction sequence of the conversion of A to D.

Dehydration reaction:

`\bold{Ethanol (C_2H_5OH) + Conc. H_2SO_4 \:at \: 170^o C\rightarrow Ethylene (C_2H_4)}`

Hydrogenation reaction:

`\bold{Ethylene (C_2H_4) + H_2 \:in \:presence \:of \:Pt \:catalyst \rightarrow Ethane (C_2H_6)}`

Chlorination reaction:

`\bold{Ethane (C_2H_6) + Cl_2 in\: presence \:of \:sunlight \rightarrow 1,2-Dichloroethane (C_2H_4Cl2)}`

Wurtz reaction:

`\bold{1,2-Dichloroethane (C_2H_4Cl_2) + 2 Na\: in \:presence\: of \:organic \:ether \rightarrow Butane (C_4H_(10))}`

• ii. Write the IUPAC name of C and D.

`\bold{C=Ethane (C_2H_6) }` IUPAC name=ethane

D=
`\bold{C_4H_(10)}` IUPAC name=Butane

• iii. How can you prove chemically the compound A is unsaturated?

To prove chemically that compound A is unsaturated, you can add bromine water to it. If the bromine water decolorizes, then it means that compound A is unsaturated.

• iv. Write the name of the reaction for the conversion of compound C to D.

The name of the reaction for the conversion of compound C to D is the Wurtz reaction.

Note:

Detailed explanations of the reactions:

• The reaction of ethanol with conc. H2SO4 at 170°C is a dehydration reaction. This reaction removes water from ethanol to produce ethylene.
• The reaction of ethylene with hydrogen in the presence of a Pt catalyst is a hydrogenation reaction. This reaction adds hydrogen to ethylene to produce ethane.
• The reaction of ethane with chlorine in the presence of sunlight is a chlorination reaction. This reaction adds chlorine to ethane to produce 1,2-dichloroethane.
• The reaction of 1,2-dichloroethane with sodium in the presence of organic ether is a Wurtz reaction. This reaction removes chlorine from 1,2-dichloroethane to produce butane.