Tricapped Trigonal Prismatic Molecular Geometry

Tricapped trigonal prismatic molecular geometry
Examples	ReH2−9
Point group	D3h
Coordination number	9
μ (Polarity)	0

Short description: Molecular geometry

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

↑ "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.
↑ Holleman, A. F., ed (2001). Holleman-Wiberg inorganic chemistry. San Diego, Calif. London: Academic. ISBN 978-0-12-352651-9.

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[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.

[1]

[2]

v t e 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