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LaughingGas

10+ Year Member
May 17, 2010
1,809
587
Status
Dentist
hey im confused how the methyl is directing orth/para?
help
To be ortho/para, the side groups always donate electrons, making the benzene more susceptible for electrophilic attack, aka activating groups.
Methyl groups donate their electrons by hyperconjugation (refer to ur ochem txtbook or wiki). Electrons in the C-H can temporarily jump in to the p orbital or benzene.
 
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AlbinoPolarBear

7+ Year Member
Jun 18, 2011
1,607
307
but isnt the Br in a meta position?
Look at the relative substituents in a molecule.

Electron donating groups will direct the Br ortho and para.
CH3 is a donating group.
Br will be either ortho or para to the CH3 group.

Electron withdrawing groups will donate the Br to the meta position.
COOH is a withdrawing group.
The Br will be in the meta position compared to the COOH group.

The answer given fits these criterias.
 
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