Pentagonal planar molecular geometry

Pentagonal planar molecular geometry

Examples	XeF₅⁻
Steric number	7
Coordination number	5
Bond angle(s)	72°, 144°
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 XeF−
5 and IF2−
5.^[1] Both are derived from the pentagonal bipyramid with two lone pairs occupying the apical positions and the five fluorine atoms all equatorial.

References

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

Molecular geometry

Coordination number 2	Linear Bent

Coordination number 3	Trigonal planar Trigonal pyramidal T-shaped

Coordination number 4	Tetrahedral Square planar Seesaw

Coordination number 5	Trigonal bipyramidal Square pyramidal Pentagonal planar

Coordination number 6	Octahedral Trigonal prismatic Pentagonal pyramidal Distorted octahedral

Coordination number 7	Pentagonal bipyramidal

Coordination number 8	Square antiprismatic

Coordination number 9	Tricapped trigonal prismatic Capped square antiprismatic

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