8. Aromaticity and Arene

Question 1

what are the requirements for a molecule to be considered aromatic?

Answer 1

1. must obey Huckel’s rule
2. a concentric ring with p orbitals and resonance
3. planar, not sp3
4. cyclic

Question 2

how many pi electrons are in a double bond?

Answer 2

two

Question 3

what is the formula of Huckle’s rule?

Answer 3

4n+2=number of pi electrons

n is what you solve for

Question 3

what does it mean if n equals a fraction in Huckel’s rule?

Answer 3

the molecule is not aromatic

Question 4

what does it mean if n equals a whole number in Huckel’s rule?

Answer 4

then the molecule is aromatic

Question 5

what other molecules other than carbon and hydrogen can also be considered aromatic?

Answer 5

nitrogen, oxygen and sulfur

Question 6

how many pi electrons does nitrogen donate when sp3 hybridized?

Answer 6

2

Question 7

how many pi electrons does nitrogen donate when sp2 hybridized?

Answer 7

0

Question 8

how many pi electrons does sulphur donate when sp3 hybridized?

Answer 8

2

Question 8

how many pi electrons does oxygen donate when sp3 hybridized?

Answer 8

2

Question 9

how do you name benzene derivatives in terms of the functional group?

Answer 9

put the functional group names first then the word benzene

Question 10

when do you use the word ortho?

Answer 10

when functional groups are on the first and second carbon

Question 11

when do you use the word meta?

Answer 11

when functional groups are on the first and third carbon

Question 12

when do you use the word para?

Answer 12

when functional groups are on the first and fourth carbon

Question 13

when is an aromatic ring considered a substitute on the carbon chain?

Answer 13

when the aromatic ring is of lower priority compared to the functional groups on the main chain