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Introduction Symmetry Operations Point Groups

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Symmetry Operations

Inversion, Center of Inversion (i)


A center of symmetry: A point at the center of the molecule. (x,y,z) --> (-x,-y,-z).


M is the center of inversion. See how all atoms change around the center.

Center of inversion can only be in a molecule. It is not necessary to have an atom in the center (benzene, ethane).

Tetrahedral, triangles, pentagons don't have a center of inversion symmetry.

Examples:


Mo(CO)6


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Ethane(staggered)

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Go to the Exercise for Inversion »

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