Tricapped trigonal prismatic molecular geometry

Short description: Molecular geometry

Tricapped trigonal prismatic molecular geometry

Examples| ReH2−9
Point group| D3h
Coordination number| 9
μ (Polarity)| 0

In chemistry, the tricapped trigonal prismatic molecular geometry describes the shape of compounds where nine atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a triaugmented triangular prism (a trigonal prism with an extra atom attached to each of its three rectangular faces).[1]

## Examples

* ReH2−9[2]
* Ln(H2O)3+9 (Ln = La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy)
* Th(H2O)4+9

## References

1. ↑ "4.1.4: Coordination Numbers and Structures" (in en). 2021-12-20. https://chem.libretexts.org/Courses/Earlham_College/CHEM_361:_Inorganic_Chemistry_(Watson)/04:_d_Block_Chemistry/4.01:_Coordination_Chemistry_I_-_Structure_and_Isomers/4.1.04:_Coordination_Numbers_and_Structures.
2. ↑ Holleman, A. F., ed (2001). Holleman-Wiberg inorganic chemistry. San Diego, Calif. London: Academic. ISBN 978-0-12-352651-9.

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Molecular geometry (VSEPR)

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

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