Halogenoalkanes Flashcards
2 different types of mechanism in hydrolysis of halogenoalkane s
Sn1
Sn2
Sn1
Only 1 reactant molecule or ion is present in the rate determining slow step of this reaction
What halogenoalkanes undergo Sn1?
Tertiary sometimes secondary
How many steps does Sn1 occur in?
2
Sn1 rate equation
Only has 1 molecule in it: shows only 1 molecule must be present in the rate determining step
Sn1 hydroxide ion reacts…
After the rate determining step because it is not in the rate equation: only 1 molecule present in rate determining step
Intermediate phase in
Sn1 where the polar bond breaks between carbon and halogen
Why do tertiary halogenoalkane undergo sn1?
Because due to the presence of 3 alkyl groups to the carbon that the halogen is bonded to, there is little space for the OH- nucleophile to attack the carbocation
So must occur in 2 steps