Aromatics Flashcards
1
Q
What are aliphatics?
A
Carbon chains and rings (not benzene)
2
Q
What are aromatics?
A
contain benzene rings
3
Q
What is the molecular formula of benzene?
A
C6H6
4
Q
What is the name of the Kekule cycle
A
cyclohexa-1,3,5triene
5
Q
What are the pieces of evidence that Kekule model is incorrect?
A
- Benzene doesn’t decolourise bromine water
- All the C-C bonds are the same length
- benzene is 152 kJ less exothermic than expected
It is more stable than expected
6
Q
what is the correct model of benzene?
A
Delocalised model
7
Q
what is the structure and bonding of benzene?
A
- Each carbon forms, three bonds in a trigonal planar structure
- spare p orbital overlaps sideways
- form delocalised ring of electrons making benzene more stable
8
Q
when will the root name of a compound benzene?
A
when the group attached to the Benzeze is;
- An alkyl group
- A halogen
- A nitro group
- A carboxylic acid
9
Q
What is the other prefix of benzene?
A
phenyl
