Equivalent resonating structures precisely are any two or more stages between the complete displacement of a charge over an unsaturated alkyl group or alkyl and non - alkyl group.

Non - equivalent resonating structures are the structures in which either the placement of atoms, or the no. of electrons or the displacement of charge during resonance are different.

Equivalent Resonating Structure:

Equivalent resonating structures are a set of resonating structures that have the same energy level and contribute equally to the overall hybrid structure. These structures represent the same molecule and differ only in the distribution of electrons.

Non-Equivalent Resonating Structure:

Non-equivalent resonating structures are a set of resonating structures that have different energy levels and contribute unequally to the overall hybrid structure. These structures represent the same molecule but differ significantly in the distribution of electrons.

Explanation:

Resonance is a phenomenon that occurs in molecules where electrons are delocalized over multiple atoms. Resonating structures are a set of structures that represent the same molecule but differ in the distribution of electrons. The actual structure of the molecule is a hybrid of these structures.

Equivalent resonating structures are structures that have the same energy level and contribute equally to the overall hybrid structure. This means that the electrons are distributed evenly throughout the molecule in all equivalent structures. For example, in the nitrate ion (NO3-), all three oxygen atoms are equivalent. The resonating structures for this molecule are all equivalent because they contribute equally to the overall hybrid structure.

Non-equivalent resonating structures are structures that have different energy levels and contribute unequally to the overall hybrid structure. This means that the electrons are distributed unevenly throughout the molecule in non-equivalent structures. For example, in the benzene molecule (C6H6), the resonating structures are non-equivalent because they have different energy levels and contribute unequally to the overall hybrid structure.

In summary, equivalent resonating structures are a set of structures that have the same energy level and contribute equally to the overall hybrid structure, while non-equivalent resonating structures have different energy levels and contribute unequally to the overall hybrid structure.