In
chemistry, the capped octahedral molecular geometry describes the shape of compounds where seven atoms or groups of atoms or ligands are arranged around a central atom defining the vertices of a
gyroelongated triangular pyramid. This shape has C
3v symmetry and is one of the three common shapes for heptacoordinate transition metal complexes, along with the
pentagonal bipyramid
In geometry, the pentagonal bipyramid (or dipyramid) is third of the infinite set of face-transitive bipyramids, and the 13th Johnson solid (). Each bipyramid is the dual of a uniform prism.
Although it is face-transitive, it is not a Plat ...
and the
capped trigonal prism.
Examples of the capped octahedral molecular geometry are the heptafluoromolybdate () and the heptafluorotungstate () ions.
The "
distorted octahedral geometry" exhibited by some AX
6E
1 molecules such as
xenon hexafluoride
Xenon hexafluoride is a noble gas compound with the formula XeF6. It is one of the three binary fluorides of xenon, the other two being XeF2 and XeF4. All known are exergonic and stable at normal temperatures. XeF6 is the strongest fluorinati ...
(XeF
6) is a variant of this geometry, with the lone pair occupying the "cap" position.
References
Stereochemistry
Molecular geometry
{{chemistry-stub