Exam 2 - Actovators/Deactovators

Question 1

Answer 1

moderate activator
ortho para

Question 2

Answer 2

moderate deactivator
meta

deactivate through injection (ewg draw away from ring) and res structures

less e desnity in ring - slower rxn.

Question 3

Answer 3

strong activator
ortho para

Question 4

Answer 4

moderate deactivator
meta

Question 5

Answer 5

moderate deactivator
meta

Question 6

Answer 6

moderate deactivator
meta

Question 7

Answer 7

strong deactivator
meta

Question 8

Answer 8

weak deactivator
ortho para

halogens
electrong withdrawing through induction - deactovators
but ortho para has an extra resinance structutr so it is ortho para

Question 9

Answer 9

strong activator
ortho para

Question 10

Answer 10

strong activator
ortho para
(meta has higher activation energy)
adding electron density to ring via the lone pairs - more stable

Question 11

Answer 11

moderate activator
ortho para

Question 12

Answer 12

moderate activator
ortho para
(meta has higher activation energy)
adding electron density to ring via the lone pairs - more stable

Question 13

Answer 13

strong activator
ortho para

Question 14

Answer 14

moderate deactivator
meta

Question 15

Answer 15

**weak activator
ortho para **
(meta has higher activation energy)
adding electron density to ring via electron donating group - more stable

ortho more than para - ONLY for alkyl groups

Question 16

Answer 16

strong activator
ortho para

Question 17

Answer 17

moderate deactivator
meta

Question 18

Answer 18

moderate activator
ortho para

Question 19

Answer 19

strong deactivator
meta

Question 20

Answer 20

strong deactivator
meta

Question 21

Answer 21

moderate deactivator
meta

Question 22

Answer 22

Question 23

Answer 23

Question 24

Answer 24

Question 25

Answer 25

Question 26

Answer 26

Question 27

Answer 27

Question 28

Answer 28

Question 29

Answer 29

Question 30

Why is alkyl an actavating group

Answer 30

has + adjacent to electron donating group, more stable - preferental activity to this postion (has this ast orto and para but ortho major for alkyls)

electron donating group takes electron density and pushes it into the ring (making ring more elctron rich)

Question 31

Why are lone pairs (avalable) activating groups

Answer 31

lone pair is electron withdrawing (because of difference in electronegativity) but is resonance stabalized, use lone pair to creat one more res stablaized structure

(aka only possible because lone pairs can be donated into ring)

Question 32

why are conjugated pi bonds deactivating

Answer 32

by induction. pulls electron density away from ring and has destabalized resonance structure

Question 33

Halogens and deactvating

Answer 33

are deactivators because of electron withdrawing through enduction BUT exibit an extra resonance structure so they are ortho/para directors