[‚dī¦fəŋk·shən·əl ′mäl·ə‚kyül] (organic chemistry) An organic structure possessing two sites that are highly reactive.

What is difunctional?

: of, relating to, or being a compound with two highly reactive sites in each molecule.

What does functionality mean in chemistry?

In chemistry, functionality is the presence of functional groups in a molecule. In organic chemistry (and other fields of chemistry) functionality of a molecule has a decisive influence on its reactivity. ... A monofunctional molecule possesses one function, a difunctional two, a trifunctional three, etc.