rotation is possible around sigma bonds but not around pi bonds because pi bonds are always made from hybridized orbitals pi bonds are stronger and resist rotation sigma bonds occur above and below the internuclear axis while pi bonds are only along the internal axis or sigma bonds maintain orbital overlap during rotation while rotation would break orbital overlap between pi orbitals

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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rotation is possible around sigma bonds but not around pi bonds because

pi bonds are always made from hybridized orbitals

pi bonds are stronger and resist rotation

sigma bonds occur above and below the internuclear axis while pi bonds are only along the internal axis

or

sigma bonds maintain orbital overlap during rotation while rotation would break orbital overlap between pi orbitals

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