Pentagonal pyramidal molecular geometry

Pentagonal pyramidal molecular geometry
Examples	XeOF−; 5
Point group	C5v
Coordination number	6
Bond angle(s)	90°, 72°
μ (Polarity)	>0

In chemistry, pentagonal pyramidal molecular geometry describes the shape of compounds where in six atoms or groups of atoms or ligands are arranged around a central atom, at the vertices of a pentagonal pyramid. It is one of the few molecular geometries with uneven bond angles.

AX₆E₁

Examples

XeOF⁻
₅[1]
IOF²⁻
₅[1][2]

References

Baran, E. (2000). "Mean amplitudes of vibration of the pentagonal pyramidal XeOF⁻
₅ and IOF²⁻
₅ anions". J. Fluorine Chem. 101: 61–63. doi:10.1016/S0022-1139(99)00194-3.
Housecroft, Catherine E.; Sharpe, Alan G. (2005). Inorganic Chemistry (2nd ed.). Pearson Prentice-Hall. p. 485. ISBN 0130-39913-2.

Pentagonal pyramid, Wolfram MathWorld

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[Baran-1] Baran, E. (2000). "Mean amplitudes of vibration of the pentagonal pyramidal XeOF⁻
₅ and IOF²⁻
₅ anions". J. Fluorine Chem. 101: 61–63. doi:10.1016/S0022-1139(99)00194-3.

[2] Housecroft, Catherine E.; Sharpe, Alan G. (2005). Inorganic Chemistry (2nd ed.). Pearson Prentice-Hall. p. 485. ISBN 0130-39913-2.

Molecular geometry
VSEPR theory Coordination number
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
Coordination number 7	Pentagonal bipyramidal Capped octahedral Capped trigonal prismatic
Coordination number 8	Square antiprismatic Dodecahedral Bicapped trigonal prismatic
Coordination number 9	Tricapped trigonal prismatic Capped square antiprismatic