Synthesis 2d - Alkenes

Question 1

How are alkenes prepared from alcohols?

Answer 1

Dehydration of alcohols using concentrated H2SO4

Question 2

How are alkenes produced from monohaloalkanes?

Answer 2

Based induced elimination of hydrogen halides from monohaloalkanes.

Question 3

How do alkenes form alkanes?

Answer 3

Electrophilic addition reaction with hydrogen in the presence of a catalyst.

Question 4

How do alkenes form dihaloalkanes?

Answer 4

Electrophilic addition reaction with halogens

Question 5

How do alkenes form monohaloalkanes?

Answer 5

Electrophilic addition with hydrogen halides.

Question 6

Alkenes form alcohols by?

Answer 6

Electrophilic addition reactions with water using an acid catalyst

Question 7

Markinovs rule?

Answer 7

When a hydrogen halide or water is added to an unsymmetrical alkene, the hydrogen atom becomes attached to the carbon with the most hydrogen atoms attached to it already.

Question 8

What is Markinovs rule used for?

Answer 8

Predicting major and minor products formed during the reaction of a hydrogen halide or water with alkenes

Question 9

What reaction mechanisms are needed to know how to draw?

Answer 9

Mechanisms for:
- addition of hydrogen halides to form monohaloalkanes
- acid catalysed addition of water to form alcohols
- addition of a halogen