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Chapter 8-2 - Electrophilic Addition to Alkenes
Organic Chemistry 307: Chapter 8 - Reactions of Alkenes; Section 2 - Electrophilic Addition to Alkenes
Organic Chemistry
Undergraduate 3

Additional Organic Chemistry Flashcards




The reaction of ethylene with __________ (to give ethane) is strongly __________, but the rate is very slow.
Adding a catalyst such as __________, __________, or __________ allows the reaction to take place at a rapid state.
1) Hydrogen
2) Exothermic
3) Platinum
4) Palladium
5) Nickel
Although the electrons in the __________ bond framework are tightly held, the __________ bond is delocalized above and below the __________ bond.
The __________-bonding electrons are spread farther from the __________ nuclei, and they are loosely held.
A strong __________ has an affinity for these loosely held electrons.
It can pull them away to form a new bond, leaving one of the carbon atoms with only __________ bonds and a __________ charge: a __________.
In effect, the carbon-carbon double bond can react as a __________, donating a pair of electrons to the electrophile.
1) Sigma
2) Pi
3) Sigma
4) Pi
5) Carbon
6) Electrophile
7) Three
8) Positive
9) Carbocation
10) Nucleophile
A reaction which requires a strong electrophile to attract the electrons of a pi bond and generate a carbocation is known as an __________ __________.
1) Electrophilic addition
*Mechanism 8-1: Electrophilic Addition to Alkenes*
First, a strong __________ attracts the loosely held electrons from the __________ bond of an alkene.
The electrophile forms a __________ bond to one of the carbons of the double bond, while the other carbon becomes a __________.
The carbocation (a strong __________) reacts with a nucleophile (often a weak __________) to form another sigma bond.
Step 1: Attack of the __________ bond on the __________ forms a carbocation.
Step 2: Attack by a nucleophile gives the __________ product.
1) Electrophile
2) Pi
3) Sigma
4) Carbocation
5) Electrophile
6) Nucleophile
7) Pi
8) Electrophile
9) Addition
The __________ of __________ __________ __________ specifies which part of the reagent adds to which ends of the double bond.
1) Regiochemistry
2) Orientation of addition
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