Flashcards in Organic Chemistry Alkane Reactions Deck (12):
Compare increasing carbon chains to melting and boiling point.
As the carbon chain increases, the boiling and the melting point increase.
Describe the relationship between branching and boiling point.
As branching increases then boiling point decreases.
Describe free radial stability
Tertiary is the most stable, while primary is the least stable.
Describe the initiation step of free radical halogenation
The halogen is struck by light which results in a homolytic cleavage of the halogen. You go from 0 radials to two radicals.
Describe the propagation step of free radical halogenation
The radical takes a H bond from an alkane. You go from 1 radical to another radical.
Describe the termination step of free radical halogenation
Two radicals bind together to form a stable molecule. You go from two radicals to zero radicals.
Contrast bromination and chlorination.
Bromination occurs slower and is more specific for tertiary.
Chlorination occurs faster and is less specific where it binds
- higher temperature than sn2
- bulky base to take a hydrogen
- anti position elimination which leads to cis/trans
- acid with higher temperatures
- formation of a carbocation (rearrangement)
Pi bond electrons attack an electrophile.
Creates a positive carbocation on stable carbon.
Carbocation is at the most stable position.