Some other simple phenolic compounds are shown above and on the
next page, together with their
values. The ortho, meta, and para isomers of cresol, which differ
only in the relative positions of substituents around the aromatic
ring, all have roughly the same weak acidity. The -OH group is only
acidic when it is attached directly to an aromatic ring. Benzyl
alcohol is not an acid; it is an alcohol similar to ethanol.
group effectively insulates the -OH from the ring and prevents it
from joining the delocalized electron system.
Benzyl alcohol is a structural isomer of the three cresols, since
they all have the ame overall formula, CHO.
So, for that matter does anisole, or methyl phenyl ether (above).