Orgo 2

Why is a benzene ring a functional group?

Because it has 6 pi electrons that work as a single group, not as three individual groups

what process does cyclohexene reaction with bromine (br2)

addition alkene process

why does bromine not react with benzene

because the addition of br2 disrupts the stability of benzene

what are derivatives of benzene called?

substituted benzenes

what is the term used to describe derivatives of benzene

aromatic

what are compounds called when they contain the functional group benzene

arene

what is the parent suffix of an arene compound?

benzene

what is this molecule

hydroxybenzene/phenol

what is this molecule

methylbenzene/toulene

what is this molecule

chlorobenzene

what is this compound?

aminobenzene/aniline

what is this compound?

anisole

what is this compound?

benzaldehyde

What is this compound?

benzoic acid

why do we use common names for functional groups with naming be arene compounds

so we only have to list one substituent - makes the name shorter

what must be done if more than one substituent is present on a benzene

number the substituents

1,2 disubstitution

ortho (o)

1,3 disubstitution

meta (m)

1,4 disubstitution

para (p)

if an amino/functional group is present, what position is it assigned

position 1

ch3

toluene

oh

phenol

och3

anisole

nh2

aniline

no2

nitro

-oic acid

aldehyde

What are the criteria for aromacity

1. the compound must be a ring

2. the compound must have continuously overlapping p-orbitals (all atoms must having the same hybridization)

   1. the ring must contain an odd number of pi electrons

What is the formula for huckel numbers

4n+2
n = number of double bonds

what are the characteristics of an antiaromatic compound

1. it is unstable

2. it is a ring with continuous system of overlapping p orbitals

   1. it has 4n pi electrons

how can we make a nonaromatic compound aromatic

depronate (subtract a hydrogen ion) from the compound