Aromatic Chemistry Flashcards
1
Q
What is benzene?
A
A cyclic, planar molecule
2
Q
What is the formula for benzene?
A
C₆H₆
3
Q
Benzene structure [2]:
A
- Each carbon is bonded to 2 other carbons and 1 hydrogen
- Final lone electron is in a p-orbital that sticks out below the planar ring
4
Q
What happens to the C-C bonds due to the delocalised electrons?
A
- Structure of c-c bonds in the molecule are the same
- They have the same bond length
5
Q
What is the bond length of the c-c bonds in benzene?
A
139pm
6
Q
What do the electrons in the p-orbital of benzene form?
A
A ring of delocalised electrons
7
Q
cyclohexa-1,3,5-triene structure [2]:
A
- Called kekule’s structure
- Has alternating double and single bonds
8
Q
which one is more stable?
Benzene
cyclohexa-1,3,5-triene
A
benzene
9
Q
Why is benzene more stable then cyclohexa-1,3,5-triene? [2]:
A
- Benzene has delocalised electrons
- It is a planar aromatic molecule so its p orbitals overlap
