Organic Chemistry - Elimination and Free Radical Substitution (10.1)

Question 1

What takes place in an elimination reaction?

Answer 1

• OH- acts as a base not a nucleophile
• ## takes place in ethanol

Question 2

E1 reactions will favour the more stable product due to the planar carbonation intermediate. True or False?

Answer 2

True

Question 3

The more substituted alkene is more stable. Is it the major or minor product?

Answer 3

Major product.

Question 4

In elimination reactions from alcohols, what occurs?

Answer 4

• making a good leaving group using the acid catalyst (concentrated)
• oxygen atom on the alcohol acts as a base (H acceptor)

Question 5

Asymmetric substrates give 1 product. True or False?

Answer 5

False - they give 2 products.

Question 6

By which process is an alkane converted to a haloalkane?

Answer 6

Free radical substitution

Question 7

What is a free radical and what does it do?

Answer 7

• it is a reactive species with an unpaired electron

- formed when a halogen molecule is exposed to UV light (homolytic fission)

Question 8

What does one fish hook arrow represent?

Answer 8

The moving of 1 electron.

Question 9

What happens in the initiation step of FRS?

Answer 9

• generation of free radical using UV light

Question 10

What happens in the propagation step of FRS?

Answer 10

Free radical reacts to form new free radicals.

Question 11

What happens in the termination step of FRS?

Answer 11

2 free radicals come together to make a stable molcule.