Methyl acetate Thiophenol Ethylamine Malonic acid Ethanolamine Glycine Glycerol (R)-Cysteine In chemistry, functionality is the presence of functional groups in a molecule.
A monofunctional molecule possesses one functional group, a bifunctional (or difunctional) two, a trifunctional three, and so forth.
Thus in the case of a functionality of f = 2 a linear polymer is formed by polymerizing (a thermoplastic).
Monofunctional monomers do not exist as such molecules lead to a chain termination.
[8] However, IUPAC definition and the use of the term in organic chemistry differ with respect to the functionality of a double bond.