Directing groups Flashcards
What does it mean if the ring is activated?
If an atom attached to the benzene ring can donate a pair of electrons (e.g -OH) into the delocalised system of pi electros
What is affected when the ring is activated?
Electron density, position of substituents and the electron withdrawing group
What happens to electron density when the ring is activated?
It is increased so it is more attractive to electrophile
What happens to substituents when the ring activated?
They go to the 2nd or 4th position
What happens to the electron withdrawing group when the benzene ring is activated?
They deactivate the benzene ring and tend to go to the 3rd position
What are types of directing groups?
2,4 and 3
What are the 2,4 directing groups?
-OH and -NH2
What is the effect of the 2,4 directing groups?
They activate the ring
What is the 3 directing group?
-NO2
What is the effect of the 3 directing group?
It deactivates the ring
