Final answer:
Tautomers are examples of constitutional isomers, which have the same molecular formula but differ in the sequence of bond connections. They can interconvert through a process called tautomerization, like the enol-ketone equilibrium.
Step-by-step explanation:
Tautomers are examples of constitutional isomers. Constitutional isomers are molecules that have the same molecular formula but differ in the sequence of bond connections between atoms. This can result in various types of isomers, such as skeletal isomers, functional group isomers, and positional isomers. Tautomers are a special case of constitutional isomers, where they can readily interconvert through a process known as tautomerization, a chemical reaction that changes the placement of certain atoms and the location of multiple bonds within the molecule. An example of tautomerism is the equilibrium between an enol and its isomer ketone, such as the interconversion of but-2-ene-2-ol and but-2-one.