Organic Chemistry
The bromination would occur at the meta position because the pyridinium ion substituent is a strong deactivating group and acts as a meta director.
The bromination would occur at the ortho position because the pyridinium ion substituent is a weak deactivating group and acts as an ortho director.
The bromination would occur at the meta position because the pyridinium ion substituent is a weak deactivating group and acts as a meta director.
The bromination would occur at the para position because the pyridinium ion substituent is a strong deactivating group and acts as a para director.