Chapter 17 Flashcards
Bro inaction of a benzene includes
Aluminum bromide AlBr2
Or Farers bromide FeBr2
And
Br2
Addition to a benzene ring always consists of
A strong nucleophile and a benzene ring
What molecule must be used when Iodinating benzene
Nitric acid. HNO3
In what reaction does sulfuric and nitric acid make a nironium catin that ads to a benzene
Nitration of benzene
Sulfonate on of benzene ads what group to benzene
HSO3 cation
What are the reactants to sulfonate a benzene
Concentrated sulfuric acid ( fuming ) H2SO4
Sulfur trioxide (SO3)
Benzene
The main purpose of friedel craft alkylation is to create
Alkyl benzenes
Friedel craft acylation creates
Acylbenzenes
What is the purpose of the strong Lewis acid in the fridel craft reactions
Creates a poor complex with the alkyl halide so the benzene can attack the positive carbon
What are the reactants for a friedel craft alkylation
Alkylehalide
Strong lewis acid of the same halide
The only difference between acylation and alkylation of benzene is
An acylhalide is used I place of an alkyl halide
When using friedel craft alkylation the a carbocation is created
What will this cause that can change the expected result
Rearrangement
Freidel craft reactions will not work if what is already present on the benzene
Deactivatiion group stronger than a halogen
A group attached to a benzene that allowed them compound to react faster than benzene by its self is known as an
Activating group
A group attached to a benzene that makes the compound react slower than a benzene is known as a
Deactivating group
Activating groups will give reactants with what configuration
Ortho and para
Deactivating groups will give what formation
Meta
What deactivating group is an exception that will give ortho and para
Halogens
What type of group gives the best resonance structure when attached to the ortho and para
Activating
What group gives very unstable resonance structures when another group is reacted at the ortho and pare
Deactivating
When there are two preexisting groups on a benzene what position will a new reactant almost never be placed
Ortho between the two preexisting groups
Why will a new group not react to the ortho position between two groups
Steric hindrance
What reaction will reduce acyle benzenes with
Amalgamated zinc ( Zn(Hg))
Aqueous HCl
Clemmonsen reduction
If a friedel craft alkylation reaction fails to creat a product due to rearrangement what two reactions can be done to reach the wanted product
Friedel craft acylation. Then a Clemmenson reduction
