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Ch.9 - Molecular Geometry and Bonding Theories
Chapter 9, Problem 55d

(d) Can two s orbitals combine to form a p bond? Explain.

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1
Understand the nature of atomic orbitals: s orbitals are spherical in shape, while p orbitals are dumbbell-shaped and have directional characteristics.
Recognize the types of bonds: Sigma (σ) bonds are formed by the head-on overlap of orbitals, while pi (π) bonds are formed by the side-to-side overlap of orbitals.
Consider the overlap possibilities: s orbitals can overlap with each other or with other orbitals to form sigma bonds due to their spherical symmetry.
Analyze the formation of pi bonds: Pi bonds require parallel, side-to-side overlap, which is characteristic of p orbitals, not s orbitals.
Conclude based on orbital characteristics: Since s orbitals lack the directional nature needed for side-to-side overlap, they cannot combine to form pi bonds.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Orbital Hybridization

Orbital hybridization is the process by which atomic orbitals mix to form new hybrid orbitals that can accommodate bonding. In the context of s and p orbitals, hybridization allows for the formation of bonds that are stronger and more directional than those formed by the original atomic orbitals alone.
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Types of Chemical Bonds

Chemical bonds can be classified into sigma (σ) and pi (π) bonds. Sigma bonds are formed by the head-on overlap of orbitals, while pi bonds result from the side-to-side overlap of p orbitals. Understanding these types of bonds is crucial for determining how different orbitals can combine to form stable molecular structures.
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Orbital Overlap

Orbital overlap refers to the interaction between atomic orbitals when atoms approach each other to form a bond. For a bond to form, there must be sufficient overlap between the orbitals involved. In the case of s orbitals, they can only form sigma bonds due to their spherical shape, while p orbitals can form both sigma and pi bonds depending on their orientation.
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