IB organic reactions

 

 

ALKANE → ALKANE + ALKENE

 

eg. OCTANE → PENTANE + PROPENE

 

type of reaction, equation and conditions

 

CRACKING

 

CH3(CH2)6CH3 → CH3CH2CH2CH2CH3 + CH2=CHCH3

 

HEAT AND CATALYST

 

ALKANE + HALOGEN →

 

eg. METHANE + BROMINE

 

reaction type, conditions, mechanistic equations

 

 

HOMOLYTIC FREE RADICAL SUBSTITUTION

 

U.V. LIGHT, ROOM TEMPERATURE

 

initiation  Cl2 → 2Cl

propogation  Cl+ CH4 → HCl + CH3

propogation  CH3+ Cl2  CH3Cl + Cl

termination CH3+ Cl• CH3Cl

 

ALKENE + HALOGEN →

 

eg. ETHENE + CHLORINE


reaction type, conditions, product, mechanistic equations


 

ELECTROPHILIC ADDITION

 

room temperature, light not required

 

1,2-dichloroethane

 

CH2=CH2 + Clδ+-Clδ- → CH2Cl-CH2+ + Cl

 

CH2Cl-CH2+ + Cl→ CH2ClCH2Cl

ALKENE + STEAM →

 

eg. PROPENE + STEAM


reaction type, conditions, product, equation


ELECTROPHILIC ADDITION

 

heat, strong acid catalyst (phosphoric acid)

 

propanol (propan-ol or propan-2-ol)

 

CH2=CHCH3 + H-OH → CH3CHOHCH3