My class 12 chemistry textbook says that phenol molecule has three reactive sites or it's functionality is three. But I am confused whether it is so or not, because, what I know, phenol has three double bonds, it must have a functionality of six. Besides, it also has an -OH which is yet another reactive site, so in all making it seven. Please help so that I may have a clear understanding of how to judge functionality of a monomer molecule.
closed as unclear what you're asking by orthocresol♦, Jan, Wildcat, M.A.R., bon Oct 15 '16 at 14:26
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Phenol has $3$ double-bond-equivalent, but not $3$ localized double bonds:
Look at its resonance structure:
Therefore, to a electrophile, there are $3$ reaction sites, which are the ortho- and the para- positions.
A nuecleophile does not attack phenol.