SNS - Organic Chemistry - Reactions

Question 1

X2 → 2X•

Answer 1

Alkanes

Free Radical Substitution

Initiation

Question 2

X• + RH → HX + R•

Answer 2

Alkanes

Free Radical Substitution

Propagation

Formation of Alkyl Radicals

Question 3

R• + X2 → RX + X•

Answer 3

Alkanes

Free Radical Substitution

Propagation

Reaction of Alkyl Radicals

Question 4

2X• → X₂

Answer 4

Alkanes

Free Radical Substitution

Termination

Formation of Halogens

Question 5

R• → R₂

Answer 5

Alkanes

Free Radical Substitution

Termination

Formation of Alkanes

Question 6

X• + R• → RX

Answer 6

Alkanes

Free Radical Substitution

Termination

Formation of Alkyl Halides

Question 7

Reactions

Alkanes

Answer 7

1. Combustion
2. Free radical halogenation
3. Pyrolysis
4. Substitution - nucleophilic - SN1 and SN2

Question 8

C3H8 + 5O2 → 3CO2 + 4H2O + heat

Answer 8

Alkanes

Combustion (propane)

Question 9

CH₃CH₂CH₃ heat→ CH₃• + •CH₂CH₃

Answer 9

Alkanes

Pyrolysis

Formation of smaller-chain alkyl radicals

Question 10

2CH₃• → + CH₃CH₃

2•CH₂CH₃ → CH₃CH₂CH₂CH₃

Answer 10

Alkanes

Pyrolysis

Formation of alkanes

Question 11

CH₃• + •CH₂CH₃ → CH₄ + CH₂=CH₂

Answer 11

Alkanes

Pyrolysis

Disproportionation

Question 12

Alkenes

Reactions

Answer 12

1. Reduction
2. Electrophilic Addition - (a) HX, (b) X₂, (c) H2O
3. Free Radical Addition
4. Hydroboration
5. Oxidation - (a) Potassium Permanganate, (b) Ozonolysis, (c) Peroxycarboxylic Acids
6. Polymerisation

Question 13

CH2=CH2 R•,heat,high-pressure→ RCH2CH2(CH2CH2)nCH2CH2R

Answer 13

Alkenes

Polymerisation - formation of polyethylene from ethylene

Question 14

Alkynes

Reactions

Answer 14

1. Reduction
2. Addition - (a) Electrophilic, (b) Free Radical
3. Hydroboration
4. Oxidation