how do resonance structure related to its real structure?

resonance structure is just another way to write the lewis dot with different formal charges and bond order

As long as you understand that none of the resonance structures written is the correct structure and that the real structure is considered a hybrid of all possible resonance structures, what you have written is ok.

CH3CO2

Resonance structures are alternative ways to represent the arrangement of electrons in a molecule or ion. They are used when a single Lewis structure cannot fully represent the bonding in a compound due to the presence of delocalized electrons. The concept of resonance is commonly encountered in organic chemistry.

Resonance structures are connected to the real structure through a phenomenon called resonance hybridization. In a resonance hybrid, the actual molecule is a combination, or blend, of all of its resonance structures. The resonance hybrid represents the true electronic structure of the molecule or ion, taking into account the delocalization of electrons.

To identify resonance structures and understand their relationship to the real structure, you can follow these steps:

1. Identify the molecule or ion you are studying.
2. Draw the Lewis structure for the molecule or ion, ensuring that you have the correct number of valence electrons.
3. Look for atoms that can undergo electron delocalization, such as carbon, oxygen, or nitrogen.
4. Determine if the molecule or ion can be adequately represented by a single Lewis structure. If there are multiple possibilities for placing the electrons and achieving octets, consider the presence of resonance structures.
5. Move electrons in the molecule or ion to create different resonance structures while maintaining the same overall connectivity of atoms.
6. Assign formal charges to each atom in each resonance structure to ensure the total charge of the molecule or ion is correct.
7. Compare the resonance structures to identify any patterns or differences in the arrangement of electrons and formal charges.
8. Understand that resonance structures are not individually correct representations of the molecule or ion but are used collectively to describe the delocalization of electrons.
9. Visualize the resonance hybrid, which combines all contributing resonance structures as an average of their characteristics. This hybrid gives a more accurate representation of the real structure of the molecule or ion.

In summary, resonance structures are alternative ways to represent electron delocalization in a molecule or ion. They are connected to the real structure through the concept of resonance hybridization, which represents the true electronic structure of the molecule or ion. By following the steps outlined above, you can understand the relationship between resonance structures and the real structure of a compound.