Write a Lewis structure that obeys the octet rule for each molecule or ion. Include resonance structures if necessary and assign formal charges to each atom. b. CO32– c. ClO– d. NO2–
Ch.9 - Chemical Bonding I: The Lewis Model
Chapter 9, Problem 67
How important is the resonance structure shown here to the overall structure of carbon dioxide? Explain.
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Identify the resonance structure shown in the image. The structure depicts a molecule with a sulfur atom double-bonded to one oxygen atom and single-bonded to another oxygen atom, with lone pairs on the oxygen atoms.
Understand the concept of resonance. Resonance structures are different ways of drawing the same molecule, showing the delocalization of electrons within the molecule.
Analyze the resonance structure in the context of carbon dioxide (CO2). Carbon dioxide typically has two resonance structures where the carbon is double-bonded to each oxygen atom.
Compare the given structure to the typical resonance structures of CO2. The given structure is not a resonance structure of CO2 but rather a different molecule, likely sulfur dioxide (SO2).
Conclude that the resonance structure shown is not relevant to the overall structure of carbon dioxide, as it represents a different molecule.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Resonance Structures
Resonance structures are different Lewis structures for the same molecule that depict the same arrangement of atoms but differ in the distribution of electrons. They are used to represent delocalized electrons within certain molecules, indicating that the actual structure is a hybrid of these forms. In carbon dioxide, resonance structures help illustrate the equivalent bonding between carbon and oxygen atoms, contributing to the molecule's stability.
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Resonance Structures
Molecular Geometry
Molecular geometry refers to the three-dimensional arrangement of atoms in a molecule. In carbon dioxide, the linear geometry arises from the arrangement of the double bonds between carbon and oxygen, which minimizes electron pair repulsion according to VSEPR theory. Understanding the geometry is crucial for predicting the molecule's reactivity and interactions with other substances.
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Molecular Geometry with Two Electron Groups
Bond Order
Bond order is a measure of the number of chemical bonds between a pair of atoms, which influences the bond strength and stability. In carbon dioxide, the bond order is 2 for each C=O bond, indicating a double bond. This concept is essential for understanding the overall stability and reactivity of the molecule, as higher bond orders typically correlate with stronger, shorter bonds.
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Average Bond Order
Related Practice
Textbook Question
Textbook Question
Write a Lewis structure that obeys the octet rule for each ion. Include resonance structures if necessary and assign formal charges to each atom. a. ClO3- b. ClO4- c. NO3- d. NH4+
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Textbook Question
Use formal charges to identify the better Lewis structure.
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Textbook Question
In N2O, nitrogen is the central atom and the oxygen atom is terminal. In OF2, however, oxygen is the central atom. Use formal charges to explain why.
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Textbook Question
Draw the Lewis structure (including resonance structures) for the acetate ion (CH3COO-). For each resonance structure, assign formal charges to all atoms that have formal charge.
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Textbook Question
Draw the Lewis structure (including resonance structures) for methyl azide (CH3N3). For each resonance structure, assign formal charges to all atoms that have formal charge.
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