Mechanism of the Reaction Between Ethene and Bromine - Evidence

Question 1

What compounds are formed at the end of the reaction between ethene and bromine in water that contains sodium chloride in solution?
(3)

Answer 1

1,2-dibromoethane

1-bromo-2-chloroethane

2-bromoethanol

Question 2

When is 1-bromo-2-chloroethane formed?

Answer 2

It is formed when the carbonium ion is attacked by the Cl- ion

Question 3

How is the presence of 1-bromo-2-chloroethane evidence for the mechanism?

Answer 3

Since this is formed when the carbonium ion is attacked by the Cl- ion which proves the existence of the carbonium ion as an intermediate in the mechanism

Question 4

How is 2-bromoethanol formed?

Answer 4

It is formed when the carbonium ion is attacked by the water molecule

Question 5

How does the formation of 2-bromoethanol act as evidence for the mechanism?

Answer 5

It is formed when the carbonium ion is attacked by the water molecule which proves the existence of the carbonium ion

Question 6

What is the formula for 1,2-dibromoethane?

Answer 6

CH2BrCH2Br

Question 7

What is the name of CH2BrCH2Br

Answer 7

1,2-dibromoethane

Question 8

What is the formula for 1-bromo-2-chloroethane?

Answer 8

CH2BrCH2Cl

Question 9

What is the name of CH2BrCH2Cl

Answer 9

1-bromo-2-chloroethane

Question 10

What is the formula for 2-bromoethanol?

Answer 10

CH2BrCH2OH

Question 11

What is the name of CH2BrCH2OH?

Answer 11

2-bromoethanol