Pentagonal planar molecular geometry
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|Pentagonal planar molecular geometry|
|Bond angle(s)||72°, 144°|
In chemistry, the pentagonal planar molecular geometry describes the shape of compounds where five atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a pentagon.
The only two pentagonal planar species known are the isoelectronic (nine valence electrons) ions XeF−
5 and IF2−
5. Both are derived from the pentagonal bipyramid with two lone pairs occupying the apical positions and the five fluorine atoms all equatorial.