12. Molecular Shapes & Valence Bond Theory

MO Theory: Homonuclear Diatomic Molecules

12. Molecular Shapes & Valence Bond Theory

MO Theory: Homonuclear Diatomic Molecules

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MO Theory: Homonuclear Diatomic Molecules Concept 1

Jules Bruno

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MO Theory: Homonuclear Diatomic Molecules Example 1

Jules Bruno

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Examples of s-p Mixing in Molecular Orbital Theory

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Introduction to Molecular Orbital Theory

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CHEMISTRY 101: Molecular Orbital Theory, Bond order, bond strength, magnetic properties

Matthew Gerner

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Practice this topic

Multiple Choice

Determine the number of electrons found in the π_2p orbitals for the dioxygen dication, O₂²⁺.

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Multiple Choice

Using a MO diagram, write the electron configuration for the P₂ molecule

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Multiple Choice

Which of the following statements is true about polarity?

Multiple Choice

Which of the following molecules is nonpolar?

Textbook Question

Consider the H2+ ion. (a) Sketch the molecular orbitals of the ion and draw its energy-level diagram.

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Textbook Question

Consider the H2+ ion. (b) How many electrons are there in the H2+ ion?

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Textbook Question

How would we describe a substance that contains only paired electrons and is weakly repelled by a magnetic field? Which of the following ions would you expect to possess similar characteristics: H2-, Ne2+, F2, O22 +?

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Textbook Question

(c) With what neutral homonuclear diatomic molecules are the NO+ and NO- ions isoelectronic (same number of electrons)? With what neutral homonuclear diatomic molecule is the NO- ion isoelectronic (same number of electrons)?

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Textbook Question

Consider the molecular orbitals of the P2 molecule. Assume that the MOs of diatomics from the third row of the periodic table are analogous to those from the second row. (c) For the P2 molecule, how many electrons occupy the MO in the figure?

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Textbook Question

Consider the molecular orbitals of the P2 molecule. Assume that the MOs of diatomics from the third row of the periodic table are analogous to those from the second row. (a) Which valence atomic orbitals of P are used to construct the MOs of P2?

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Textbook Question

Look at the MO diagrams of corresponding neutral diatomic species in Figure 8.22, and predict whether each of the following ions is diamagnetic or paramagnetic. Diagrams for Li2 and C2 are similar to N2; Cl2 is similar to F2. (c) F2-

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Textbook Question

One of the molecular orbitals of the H2- ion is sketched below:

(a) Is the molecular orbital a s or p MO? Is it bonding or antibonding?

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Textbook Question

At high temperatures, sulfur vapor is predominantly in the form of S21g2 molecules. (a) Assuming that the molecular orbitals for third-row diatomic molecules are analogous to those for second-row molecules, construct an MO diagram for the valence orbitals of S21g2.

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Textbook Question

Many compounds of the transition-metal elements contain direct bonds between metal atoms. We will assume that the z-axis is defined as the metal–metal bond axis. (d) Sketch the energylevel diagram for the Sc2 molecule, assuming that only the 3d orbital from part (a) is important.

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Open Question

Use the molecular orbital diagram shown to determine which of the following are paramagnetic.

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Open Question

Suppose that you have 16 diatomic molecules or ions with the valence molecular orbital arrangement shown here (Figure 1), but with different numbers of valence electrons. Species 1 has one valence electron, Species 2 has two valence electrons, etc. Classify each as diamagnetic or paramagnetic.

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