Pentagonal planar molecular geometry
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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.
| Pentagonal planar molecular geometry | |
|---|---|
 | |
| Examples | [XeF5]− |
| Point group | D5h |
| Coordination number | 5 |
| Bond angle(s) | 72° |
| μ (Polarity) | 0 |
Examples
The only two pentagonal planar species known are the isoelectronic (nine valence electrons) ions [XeF5]− (pentafluoroxenate(IV)) and [IF5]2− (pentafluoroiodate(III)).[1] Both are derived from the pentagonal bipyramid with two lone pairs occupying the apical positions and the five fluorine atoms all equatorial.
