Arenes, and its preparation

This reagents are used for preparing alkylbenzene by:

Direct alkylation

are hydrocarbons which contain both aliphatic and aromatic units

Arenes

Arenes made up of aromatic and alkane units

alkylbenzenes

Arenes made up of aromatic and alkene units

alkenylbenzenes

Arenes made up of aromatic and alkyne units

alkynylbenzenes

True or False:

the special name of the simplest alkylbenzene is styrene.

FALSE.

toluene-alkyl; styrene-alkenyl

The special name given for the dialkylbenzenes

xylene (o-,p-,m-)

Compounds containing longer side chains are named by:

substituent - alkyl group

parent - benzene

Compounds containing very complicated side chains are named as

phenylalkanes

Compounds containing more than one phenyl group are named as

derivatives of alkanes

True or False:

The alkenylbenzenes are generally named as substituted alkenes, occasionally as substituted benzenes.

TRUE

They are named as substituted alkynes

alkynylbenzenes

What reaction is this?

Direct Alkylation

What reaction is this?

Side-chain Reduction

Identify the missing reagent

CH₃COCl

What should be the starting?

(CH₃CH₂)₂CuLi

This is a dehydrogenation of an alkenylbenzene.

What are the missing reagents?

-H, Pt or Pd

This is a dehydration reaction.

Identify the missing group on the reactant

1* Alcohol

CH₂CH₂OH

What reaction mechanism is this?

Dehydrohalogenation

This is a Dehalogenation reaction. It is also known as

Simmon’ Smith Reaction

This is the aliphatic portion of arenes

Side chain

All alkyl groups present in the ring are converted to carboxyl groups, except tertiary alkyl groups. Why?

Because it has no benzylic hydrogen (the hydrogen attached to the carbon in the alkyl group).

Example: CH₃–C(–CH₃)₂

What reaction mechanism is this reagent used for?

Oxidation of dialkylbenzene

What would be the product of this oxidation reaction?

Acetophenone (C₆H₅)-COCH₃

Side-chain bromination at the benzylic position occurs when an alkylbenzene is treated with

N-Bromosuccinimide (NBS)

The benzene ring carbon where an alkyl group is bonded can be converted to a carboxyl group by: followed by treatment with _

Ozonolysis; Hydrogen peroxide