Ch 17 - Benzene & Aromatic Compounds Flashcards
0
Q
What is anti aromatic?
A
- Fulfills first 3 rules
* 4n pi electrons (0, 4, 8…)
1
Q
What is aromatic?
A
- cyclic
- planar
- conjugated
- 4n + 2 pi electrons (2, 6, 10) (Hukel’s rule)
2
Q
What is not aromatic?
A
Lacks one or more of the 4 rules
3
Q
How many pi electrons for pyridine?
A
6 (lone pair of N in sp2)
Aromatic
4
Q
How many pi electrons for pyrrole?
A
6 (2 double bonds, lone pair of N in pi bond, X-Y-Z:)
Aromatic
