Isosurface of the Density Difference at 2.32 Bohr



This image is of the density difference of molecular oxygen. The isosurfaces represent 90 percent of either positive (red) or negative (blue) density difference enclosed. This visualization shows the movement of electrons when the bond forms between two oxygen atoms. The electrons move from the area surrounding the center of the molecule to the space between the nuclei and to lobes on either side of the nuclei. These lobes are traditionally called lone pairs. Rather than being considere d pairs, these should be considered areas of higher electron density on the outer edges of the molecule.
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