Halogenoalkanes

Question 1

What allows halogenoalkanes to be good targets for nucleophiles

Answer 1

the polarity of the carbon halogen bond as they are more electronegative than the carbon

Question 2

What is the name for the reaction where a halogenoalkane is substituted

Answer 2

Nucleophilic substitution

Question 3

Draw a general nucleophilic sub mechanism where x is the nucleophile

Answer 3

Question 4

What is the name for the reaction where halogenoalkanes produce alkenes

Answer 4

Elimination

Question 5

What are the conditions for elimination

Answer 5

heated under reflux with an alkali like potassium hydroxide (KOH) dissolved in ethanol

Question 6

What is the difference in conditions for nucleophilic sub and elimination

Answer 6

Substitution is favoured in aqueous solution. OH- acts as a nucleophile.
Elimination is favoured in ethanolic solution. OH- acts as a base.

Question 7

Draw an elimination reaction between 2-iodopropane and KOH-

Answer 7