Symmetry, absorbtion and benzene

[evidenso]

Hey
Is it right that high symmetry molecules does not absorb light as good as low symmetry molecules? let's take an example like benzene versus benzene+hydroxyl?

 

[GCT]

Depends on which atom or functional group you're are referring to ; if it's the same functional group I would imagine that a symmetric attachment would be less of an influence with an electric dipole .