12. Molecular Shapes & Valence Bond Theory

MO Theory: Homonuclear Diatomic Molecules

Molecular Orbital (MO) Diagram for O2(2-)

One of the molecular orbitals of the H2- ion is sketched below:
<img src="https://lightcat-files.s3.amazonaws.com/problem_images/4f2145ace2151bbf-1661338969072.jpg" alt="" />
(a) Is the molecular orbital a s or p MO? Is it bonding or
antibonding?

Introduction to Molecular Orbital Theory

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.

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-

MO Theory: Homonuclear Diatomic Molecules Concept 1

Examples of s-p Mixing in Molecular Orbital Theory

(σ2s)2(σ*2s)2(π2p)4(σ2p)2

(σ2s)2(σ*2s)2(π2p)2(σ2p)2(π*2p)2

(σ3s)2(σ*3s)2(π3p)4(σ3p)2

(σ3s)2(σ*3s)2(π3p)2(σ3p)2(π*3p)2

Using a MO diagram, write the electron configuration for the P2 molecule<img class="fr-dib"src="https://static.studychannel.pearsonprd.tech/courses/general-chemistry/thumbnails/images/5db66095"style="width:300px;">

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.

Molecular Orbital Diagrams of Homonuclear Diatomics

(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)?

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

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 +?

Determine the number of electrons found in the π2p orbitals for the dioxygen dication, O22+.&nbsp;<img class="fr-dib"src="https://static.studychannel.pearsonprd.tech/courses/general-chemistry/thumbnails/images/8fc3c79c"style="width:300px;">

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?

Understanding Molecular Orbital Theory

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? 
<img src="https://lightcat-files.s3.amazonaws.com/problem_images/0274d1bc0c00fed2-1661276744251.jpg" alt="" />

The Molecular Orbital Theory.

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

Molecular Orbital Theory - Bonding & Antibonding MO - Bond Order

MO Theory: Homonuclear Diatomic Molecules Example 1

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

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1. Intro to General Chemistry

2. Atoms & Elements

3. Chemical Reactions

4. BONUS: Lab Techniques and Procedures

5. BONUS: Mathematical Operations and Functions

6. Chemical Quantities & Aqueous Reactions

7. Gases

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13. Liquids, Solids & Intermolecular Forces

14. Solutions

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21. Nuclear Chemistry

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[BOOK CHEM] Clutch Version

Homonuclear Diatomic Molecules are composed of 2 identical elements bonded together.

Equatorial and Axial Positions

Covalent compounds with 5 or 6&nbsp;electron groups have equatorial and axial positions for surrounding elements

MO Theory: Heteronuclear Diatomic Molecules

Heteronuclear Diatomic Molecules are composed of 2 different elements bonded together.

Bond Angles

Bond Angles&nbsp;result from surrounding elements and lone pairs around the central element positioning themselves at an optimal distance.&nbsp;

Molecular Orbital Theory

Molecular Orbital Theory&nbsp;allows us to predict the distribution of electrons within a molecule.&nbsp;

MO Theory: Bond Order

Molecular Orbital Diagrams can be used to determine the bond order of a molecule.

Electron Geometry

The simplest system for geometrical shapes that focuses on the number of electron groups around the central atom.

Hybridization

How would an&nbsp;s orbital combine with a p orbital to form a covalent bond? The answer is through hybridization where a hybrid&nbsp;oribital is formed.&nbsp;

Molecular Geometry

True Shape of Molecules that takes into account differences&nbsp;in repulsion between lone pairs and surrounding elements.

Valence Shell Electron Pair Repulsion Theory

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