Domanda del libro di testo
Sketch the bonding molecular orbital that results from the linear combination of two 1s orbitals. Indicate the region where interference occurs and state the kind of interference (constructive or destructive).
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Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving136
- Ch.2 - Atoms & Elements112
- Ch.3 - Molecules, Compounds & Chemical Equations159
- Ch.4 - Chemical Quantities & Aqueous Reactions140
- Ch.5 - Gases118
- Ch.6 - Thermochemistry106
- Ch.7 - Quantum-Mechanical Model of the Atom62
- Ch.8 - Periodic Properties of the Elements103
- Ch.9 - Chemical Bonding I: The Lewis Model104
- Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory89
- Ch.11 - Liquids, Solids & Intermolecular Forces73
- Ch.12 - Solids and Modern Material59
- Ch.13 - Solutions110
- Ch.14 - Chemical Kinetics140
- Ch.15 - Chemical Equilibrium78
- Ch.16 - Acids and Bases155
- Ch.17 - Aqueous Ionic Equilibrium176
- Ch.18 - Free Energy and Thermodynamics108
- Ch.19 - Electrochemistry118
- Ch.20 - Radioactivity and Nuclear Chemistry82
- Ch.21 - Organic Chemistry150
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831Non è quello che usi tu?Cambia libro di testo
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Tro 4th EditionCh.10 - Chemical Bonding II: Molecular Shapes & Valence Bond TheoryProblema 71
Tro 4th EditionCh.10 - Chemical Bonding II: Molecular Shapes & Valence Bond TheoryProblema 71Capitolo 10, Problema 71
Draw an MO energy diagram and predict the bond order of Be2+ and Be2- . Do you expect these molecules to exist in the gas phase?
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Start by understanding the molecular orbital (MO) theory, which describes the distribution of electrons in molecules. For diatomic molecules like Be2, we consider the combination of atomic orbitals from each Be atom to form molecular orbitals.
Identify the atomic orbitals involved: Beryllium (Be) has the electron configuration 1s^2 2s^2. For Be2, we will consider the 2s orbitals from each Be atom combining to form molecular orbitals.
Construct the MO energy diagram for Be2: The 2s orbitals combine to form a bonding molecular orbital (σ2s) and an antibonding molecular orbital (σ*2s). For Be2+, remove one electron from the highest energy orbital, and for Be2-, add one electron to the highest energy orbital.
Calculate the bond order using the formula: Bond Order = (Number of electrons in bonding MOs - Number of electrons in antibonding MOs) / 2. Apply this formula to both Be2+ and Be2- to determine their bond orders.
Evaluate the stability of Be2+ and Be2- based on their bond orders. A positive bond order suggests the possibility of the molecule existing in the gas phase, while a bond order of zero or negative indicates instability.
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Molecular Orbital Theory
Molecular Orbital (MO) Theory describes the behavior of electrons in molecules, where atomic orbitals combine to form molecular orbitals that can be occupied by electrons. These orbitals are categorized as bonding, antibonding, or non-bonding, influencing the stability and properties of the molecule. Understanding MO diagrams is essential for predicting bond order and molecular stability.
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03:06
Molecular Orbital Theory
Bond Order
Bond order is a measure of the number of chemical bonds between a pair of atoms, calculated as the difference between the number of bonding and antibonding electrons divided by two. A higher bond order indicates a stronger and more stable bond. For diatomic molecules, bond order helps predict their existence and stability in the gas phase.
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00:36Average Bond Order
Stability of Ions
The stability of ions like Be2+ and Be2- is influenced by their electronic configurations and the resulting bond orders. Be2+ has lost an electron, potentially leading to a higher bond order and greater stability, while Be2- has gained an electron, which may result in a lower bond order and less stability. Understanding these factors helps predict whether these ions can exist in the gas phase.
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03:13Intepreting the Band of Stability
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