Pentagonal planar molecular geometry

Pentagonal planar molecular geometry
Examples	[XeF5]^−
Point group	D5h
Coordination number	5
Bond angle(s)	72°
μ (Polarity)	0

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.

AX₅E₂

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.

References

1. Housecroft, C. E.; Sharpe, A. G. (2004). Inorganic Chemistry (2nd ed.). Prentice Hall. p. 498. ISBN 978-0130399137.