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L17 - Alkene Reactivity
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Total cards: 5•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (5)
#1
Front (Question)
What is a double bond in terms of e- density?
Back (Answer)
Region of high e- density - isolated (not conjugated) = nucleophilic • weaker than sigma bonds
#2
Front (Question)
How do alkenes undergo electrophilic addition reactions?
Back (Answer)
• db in C-C attack H • forms carbocations • X- ion choses most stable carbocation (Concept of regioselectivity)
#3
Front (Question)
Why do X- ions chose the more stable carbocation?
Back (Answer)
• inductive effect Occurs through sigma bonds (alkyl groups are weakly donating) • hyperconjugation
#4
Front (Question)
What is the rank order for cabocation stabalisation?
Back (Answer)
Tertiary > secondary > primary
#5
Front (Question)
What are additional stabilising effects?
Back (Answer)
• allylic carbocations • benzylic carbocation