Tricapped trigonal prismatic molecular geometry

Molecular geometry
Tricapped trigonal prismatic molecular geometry
ExamplesReH2−
9
Point groupD3h
Coordination number9
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]

It is very similar to the capped square antiprismatic molecular geometry, and there is some dispute over the specific geometry exhibited by certain molecules.[citation needed]

Examples

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

References

  1. ^ "4.1.4: Coordination Numbers and Structures". Chemistry LibreTexts. 2021-12-20. Retrieved 2024-02-02.
  2. ^ Holleman, A. F.; Wiberg, Egon; Wiberg, Nils; Eagleson, Mary; Brewer, William; Aylett, Bernhard J., eds. (2001). Holleman-Wiberg inorganic chemistry. San Diego, Calif. London: Academic. ISBN 978-0-12-352651-9.


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