12. Molecular Shapes & Valence Bond Theory
MO Theory: Bond Order
12. Molecular Shapes & Valence Bond Theory
MO Theory: Bond Order - Video Tutorials & Practice Problems
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Molecular Orbital Diagrams can be used to determine the bond order of a molecule.
Bond Order
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MO Theory: Bond Order Concept 1
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MO Theory: Bond Order Example 1
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MO Theory: Bond Order Concept 2
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MO Theory: Bond Order Example 2
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Problem
ProblemApply Molecular Orbital Theory to determine the bond order of HHe+ ion.
A
2
B
1.5
C
4
D
3
E
1
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Problem
ProblemApply molecular orbital theory to predict which species has the strongest bond.
a) O2 b) O2– c) O2+ d) All the bonds are equivalent
A
O2
B
O2-
C
O2+
D
All the bonds are equivalent
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Problem
ProblemUsing Molecular Orbital Theory, answer the following questions dealing with carbon mononitride, CN.
A
CN is diagmagnetic
B
CN– is paramagnetic
C
If an electron is removed to give CN+, the bond length decreases.
D
The π*2p orbital is the highest energy orbital containing an electron in CN.
E
If an electron is added to give CN–, the bond order increases.
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PRACTICE PROBLEMS AND ACTIVITIES (38)
- The C2 molecule has a MO diagram similar to N2 (Figure 8.22a). What is the bond order of C2 and is it paramag...
- Consider the H2+ ion. (d) What is the bond order in H2+?
- Consider the H2+ ion. (e) Suppose that the ion is excited by light so that an electron moves from a lower-ene...
- (c) Calculate the bond order in H2-.
- Draw an MO energy diagram and predict the bond order of Li2+ and Li2-. Do you expect these molecules to exist ...
- Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the p2p or...
- Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the p2p or...
- Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the p2p or...
- Explain the following: (c) The O22 + ion has a stronger O—O bond than O2 itself.
- Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the p2p or...
- Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the p2p or...
- Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the p2p or...
- Use molecular orbital theory to predict if each molecule or ion exists in a relatively stable form. a. H22 -
- Apply molecular orbital theory to predict if each molecule or ion exists in a relatively stable form. a. C22+ ...
- Using Figures 9.35 and 9.43 as guides, draw the molecular orbital electron configuration for (d) Ne22 +. In ea...
- If we assume that the energy-level diagrams for homonuclear diatomic molecules shown in Figure 9.43 can be ap...
- If we assume that the energy-level diagrams for homonuclear diatomic molecules shown in Figure 9.43 can be app...
- According to MO theory, which molecule or ion has the shortest bond length? O2, O2- , O22 -
- According to MO theory, which molecule or ion has the highest bond energy? O2, O2- , O22 -
- According to MO theory, which molecule or ion has the highest bond order? O2, O2- , O22 -
- Determine the electron configurations for CN+, CN, and CN-. (a) Which species has the strongest C¬N bond?
- Draw an MO energy diagram for CO. (Use the energy ordering of O2.) Predict the bond order and make a sketch o...
- Draw an energy diagram for HCl. Predict the bond order and make a sketch of the lowest energy bonding molecul...
- Draw a molecular orbital energy diagram for ClF. (Assume that the sp orbitals are lower in energy than the p o...
- Draw Lewis structures and MO diagrams for CN+ , CN, and CN- . According to the Lewis model, which species is ...
- Use the MO energy diagram in Figure 8.22b to describe the bonding in O2+, O2, and O2-. Which of the three is l...
- The C2 molecule can be represented by an MO diagram similar to that in Figure 8.22a. (b) To increase the bon...
- Calcium carbide, CaC2, reacts with water to produce acetylene, C2H2, and is sometimes used as a convenient sou...
- One of the molecular orbitals of the H2- ion is sketched below: (d) Compared to the H¬H bond in H2, the H¬H b...
- At high temperatures, sulfur vapor is predominantly in the form of S21g2 molecules. (d) When two electrons a...
- Place the following molecules and ions in order from smallest to largest bond order: N22+, He2+, Cl2 H2-, O22-...
- Carbon monoxide is produced by incomplete combustion of fossil fuels. (c) What is the bond order of CO? Does...
- The energy-level diagram in Figure 9.36 shows that the sideways overlap of a pair of p orbitals produces two ...
- Determine the bond order in a molecule or ion with 12 valence electrons.
- Use the molecular orbital diagram shown to determine which of the following is most stable.
- Use molecular orbital theory to predict whether or not each of the following molecules or ions should exist in...
- Use the molecular orbital diagram shown to determine which of the following is least stable.
- Complete the molecular orbital diagram for CN−. Note that the 1𝑠 orbitals are not shown.