Chapter_10_Part_4 - Chapter 10: Molecular Geometry and...

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Chapter 11 Part 4 1 of 6 Chapter 10: Molecular Geometry and Chemical Bonding Theory Part 4 c. Description of Multiple Bonding To describe a multiple bond, we need to consider that more than one orbital is involved. Each multiple bond includes two types of bonds that are distinguished by the shape of the space they occupy: s –bond (sigma bond) is cylindrical in shape along the bond axis a s –bond results when two s–orbitals overlap or when p–orbitals overlap end-on p –bond, (pi bond) is above and below the bond axis a p –bond results when two p–orbitals overlap side-ways
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Chapter 11 Part 4 2 of 6 Bonding in ethylene, C 2 H 4 (carbon–carbon double bond): Bonding in acetylene, C 2 H 2 (carbon–carbon triple bond): Molecular Orbital Theory 4. Principles of Molecular Orbital Theory While the Valence Bond Theory helps us to better understand bonding in some cases, it leaves some experimental observations unexplained. For example, we know that the oxygen molecule has unpaired electrons. How can that be explained? Molecular Orbital Theory explains bonding and better explains the example just noted. a. Bonding and Antibonding Orbitals • molecular orbitals are combinations of atomic orbitals that result from both the addition and the subtraction of atomic orbitals
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Chapter_10_Part_4 - Chapter 10: Molecular Geometry and...

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