Electrophilic Aromatic Substitution

Each of the six compounds shown at the bottom of the page has two aromatic (benzene) rings. In every case the two rings are different and are labled A & B. If an electrophilic substitution, such as nitration or bromination, is carried out on each compound can the major product(s) be predicted?
Identify which ring (A or B) will be preferentially attacked, and indicate the orientation of the substitution (ortho/para, meta or all sites).

Compound	Reactive Ring	Substitution Orientation		Compound	Reactive Ring	Substitution Orientation		Compound	Reactive Ring	Substitution Orientation
1.	A B	ortho/para meta all sites		2.	A B	ortho/para meta all sites		3.	A B	ortho/para meta all sites
4.	A B	ortho/para meta all sites		5.	A B	ortho/para meta all sites		6.	A B	ortho/para meta all sites

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