1. AROMATIC COMPOUNDS

2. REFERS TO COMPOUNDS THAT CONTAIN A BENZENE RING OR RINGS
DEFINITION
REFERS TO COMPOUNDS THAT CONTAIN A BENZENE RING OR RINGS

3. RULE: Name the substituent and add the word benzene. NOMENCLATURE
MONOSUBSTITUTED
RULE:
Name the substituent and add the word benzene.

4. Name:
butylbenzene
ethylbenzene
chlorobenzene

5. Monosubstituted (common name)
TOLUENE
PHENOL
ANILINE

6. disubstituted
There are three different ways that two groups can be attached to a benzene ring.
PREFIX POSITION
Ortho (o) 1,2
Meta (m) 1,3
Para (p) 1,4

7. 1,2-dichlorobenzene or o-dichlorobenzene
1-chloro-3-ethylbenzene or m-chloroethylbenzene
1-fluoro-4-isopropylbenzene or p-fluoroisopropylbenzene

8. disubstituted
IF one of the substituents is part of a common root, name the molecule as a derivative of the monosubstituted benzene
one with the higher priority is used as the root name for the compound and the other substituent is named as a prefix

9. disubstituted
If two groups on the benzene ring are different, alphabetize the name of the substituents preceding the word BENZENE.

10. polysubstituted
NUMBER TO GIVE THE LOWEST POSSIBLE NUMBERS TO THE SUBSTITUENTS.
ALPHABETIZE THE SUBSTITUENTS.
WHEN SUBSTITUENTS ARE PART OF COMMON ROOTS, NAME THE MOLECULE AS A DERIVATIVE OF THAT MONOSUBSTITUTED BENZENE. THE SUBSTITUENT THAT COMPRISES THE COMMON ROOT IS LOCATED AT C1, BUT “1” IS OMITTED FROM THE NAME.

11. AROMATIC COMPOUNDS WITH MORE THAN 1 RING

12. SAMPLE PROBLEM

13. EXERCISES

14. AROMATIC DRUGS, SUNSCREEN & CARCINOGENS

16. Sun Protection Factor
SPF is a measure of how much solar energy (UV radiation) is required to produce sunburn on protected skin (i.e., in the presence of sunscreen) relative to the amount of solar energy required to produce sunburn on unprotected skin. As the SPF value increases, sunburn protection increases.
In general, a sunscreen with:
SPF 2 blocks 50 percent of UVB rays
SPF 4 blocks 75 percent of UVB rays
SPF 8 blocks 87 percent of UVB rays
SPF 15 blocks 93 percent of UVB rays
SPF 30 blocks 97 percent of UVB rays
SPF 50 blocks 98 percent of UVB rays
SPF 100 blocks 99 percent of UVB rays
UVA Protection Ratings
There is currently no easy way to know how effective a sunscreen is against UVA rays. New FDA sunscreen labeling, in addition to possibly placing a cap of SPF 50+, would introduce a new UVA four-star system so that parents could easily figure out if a sunscreen offered low UVA protection (one star) or the highest UVA protection (four stars).
The new labels would also clearly state if a sunscreen offered 'no UVA protection.'

17. REACTIONS OF AROMATIC COMPOUNDS
Like the alkenes, aromatic compounds undergo a characteristics type of reaction.
Aromatic compounds undergo substitution reaction NOT addition reaction.

18. p
Why? Substitution of H by X keeps the stable aromatic ring intact. Benzene does not undergo addition reaction like other unsaturated hydrocarbons because the product would not contain a benzene ring

19. Three specific reactions of benzene are considered:
CHLORINATION (- Cl )

20. NITRATION (- NO2)

21. SULFONATION (- SO3H)

22. SEATWORK