Consider the resonance scheme shown below. Select the correct answer from the list below. A 凸 B Structure B is breaking the octet rule the charge on the carbons needs to be positive in structure C the charge on the oxygen of structure C is not positive This mechanism is free of errors. heporlock com is sharing your screen. Stop sharing Hide C C Webcar
Electronic Effects
The effect of electrons that are located in the chemical bonds within the atoms of the molecule is termed an electronic effect. The electronic effect is also explained as the effect through which the reactivity of the compound in one portion is controlled by the electron repulsion or attraction producing in another portion of the molecule.
Drawing Resonance Forms
In organic chemistry, resonance may be a mental exercise that illustrates the delocalization of electrons inside molecules within the valence bond theory of octet bonding. It entails creating several Lewis structures that, when combined, reflect the molecule's entire electronic structure. One Lewis diagram cannot explain the bonding (lone pair, double bond, octet) elaborately. A hybrid describes a combination of possible resonance structures that represents the entire delocalization of electrons within the molecule.
Using Molecular Structure To Predict Equilibrium
Equilibrium does not always imply an equal presence of reactants and products. This signifies that the reaction reaches a point when reactant and product quantities remain constant as the rate of forward and backward reaction is the same. Molecular structures of various compounds can help in predicting equilibrium.
![**Resonance Structures in Organic Chemistry**
Consider the resonance scheme shown below. Select the correct answer from the list below.
**Resonance Structures:**
A ⇄ B ⇄ C
- **Structure A**:
- Benzene ring with one double bond and an oxygen atom with two lone pairs and a positive charge.
- One lone pair of electrons on the oxygen moves to form a double bond with the adjacent carbon, while the double bond between carbon and the other carbon shifts to form a double bond between the adjacent carbon atoms.
- **Structure B**:
- Benzene ring with a double bond between the oxygen and the carbon, and an extra single bond connected to a negatively charged carbon.
- Double-headed arrow indicates resonance.
- One of the lone pairs from the negatively charged carbon moves to form another double bond within the ring, the double bond between the ring carbon and the oxygen shifts to position the lone pairs back on the oxygen, giving it a positive charge.
- **Structure C**:
- Benzene ring with an oxygen atom having three lone pairs and no charge, while the neighboring carbon adopts the positive charge due to the shift of electrons.
**Possible Answers:**
1. Structure B is breaking the octet rule.
2. The charge on the carbons needs to be positive in structure C.
3. The charge on the oxygen of structure C is not positive.
4. This mechanism is free of errors.
### Diagram Explanation:
- **Diagram A**:
The arrow represents the movement of electrons to form resonance structure B. Specifically, one lone pair on the oxygen forms a double bond, and the existing double bond shifts to an adjacent position.
- **Diagram B**:
The double-headed arrows between structures indicate resonance. The negative charge on the carbon and the movement of these electrons forms the next resonance structure C by shifting bonds and charges in the ring.
- **Diagram C**:
In structure C, the oxygen atom holds a single bond with the adjacent carbon, while that carbon holds a positive charge due to the movement of electrons forming stable resonance structures within the compound.
Make sure to review such mechanisms to ensure accurate understanding of the resonance forms in organic molecules.
**Select the correct answer from the provided options.**](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3991c7bd-acfb-40ed-bb56-29190279c7cb%2Faba89da8-4633-4019-be8d-a9a5dc26e478%2Fqj1wau9_processed.jpeg&w=3840&q=75)
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