Square antiprismatic molecular geometry information
Square antiprismatic molecular geometry
Examples
XeF2− 8, ReF− 8
Point group
D4d
Coordination number
8
μ (Polarity)
0
In chemistry, the square antiprismatic molecular geometry describes the shape of compounds where eight atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a square antiprism.[1] This shape has D4d symmetry and is one of the three common shapes for octacoordinate transition metal complexes, along with the dodecahedron and the bicapped trigonal prism.[2][3]
Like with other high coordination numbers, eight-coordinate compounds are often distorted from idealized geometries, as illustrated by the structure of Na3TaF8. In this case, with the small Na+ ions, lattice forces are strong. With the diatomic cation NO+, the lattice forces are weaker, such as in (NO)2XeF8, which crystallizes with a more idealized square antiprismatic geometry.
The distorted square antiprismatic [TaF8]3− anion in the Na3TaF8 lattice.[4]
The square antiprismatic [XeF8]2− anion in the lattice of nitrosonium octafluoroxenate(VI), (NO)2XeF8.[5]
Structure of the Bi82+ cluster in the [Bi8](GaCl4)2.
^D. L. Kepert (1978). "Aspects of the Stereochemistry of Eight-Coordination". Progress in Inorganic Chemistry. 24: 179–249. doi:10.1002/9780470166253.ch4. ISBN 9780470166253.
^Jeremy K. Burdett; Roald Hoffmann; Robert C. Fay (1978). "Eight-Coordination". Inorganic Chemistry. 17 (9): 2553–2568. doi:10.1021/ic50187a041.
In chemistry, the capped squareantiprismaticmoleculargeometry describes the shape of compounds where nine atoms, groups of atoms, or ligands are arranged...
The square antiprism is first in a series of snub polyhedra and tilings with vertex figure 3.3.4.3.n. Squareantiprismaticmoleculargeometry One World...
very similar to the capped squareantiprismaticmoleculargeometry, and there is some dispute over the specific geometry exhibited by certain molecules...
Moleculargeometry is the three-dimensional arrangement of the atoms that constitute a molecule. It includes the general shape of the molecule as well...
complexes, along with the square antiprism and the dodecahedron. It is very similar to the squareantiprismaticmoleculargeometry, and there is some dispute...
pyramid appears in chemistry as the basis for the bicapped squareantiprismaticmoleculargeometry, and in mathematical optimization as a solution to the...
as squareantiprismaticmoleculargeometry. The gyroelongated square pyramid is constructed by attaching one equilateral square pyramid to the square antiprism...
base geometry for a steric number of 7 is pentagonal bipyramidal. The most common geometry for a steric number of 8 is a squareantiprismaticgeometry.: 1165 ...
Theoretical analysis indicates OsF8 would have an approximately squareantiprismaticmoleculargeometry. Rapid cooling of fluorine and osmium reaction products:...
known as Wade's rules or the Wade–Mingos rules. The rules are based on a molecular orbital treatment of the bonding. These rules have been extended and unified...
Capped squareantiprismatic for nine-coordination To distinguish between the alternative coordinations for five-coordinated complexes, the τ geometry index...
were drawn between the ligands. Other common coordination geometries are tetrahedral and square planar. Crystal field theory may be used to explain the...
indicate the approximate geometry of the coordinating atoms around the central atom. One or more italicised letters indicate the geometry, e.g. TP-3 which is...
splitting will be lower than in the octahedral case. Square planar and other complex geometries can also be described by CFT. The size of the gap Δ between...
different atoms. Hybrid orbitals are useful in the explanation of moleculargeometry and atomic bonding properties and are symmetrically disposed in space...
acetylacetonate. The complex has a squareantiprismaticgeometry with eight nearly equivalent Hf-O bonds. The molecular symmetry is D2, i.e., the complex...
+ H2O The complex has a squareantiprismaticgeometry with eight nearly equivalent Zr-O bonds of length 2.19 Å. The molecular symmetry is D2, i.e. the...
centers adopt a squareantiprismatic structure. The β polymorph gradually converts to α at 130 °C. Of theoretical interest, molecular UF5 can be generated...
atom cluster surrounding a central atom, that is the dodecahedral moleculargeometry. Its vertices may be placed in a sphere and can also be used as a...
8-coordination in square antiprism and dodecahedral geometry. In water, calcium and strontium are most probably eight-coordinate squareantiprismatic (although...
3) 2]2+ , a 10-coordinated complex with distorted bicapped antiprismaticmoleculargeometry. The anionic [Th(NO 3) 6]2− is isotypic to its cerium, uranium...
one of the two XYn-type species known to have the rare pentagonal planar geometry, the other being [XeF5]−. ¶ [ClF6]− is distorted octahedral as the stereochemical...
In geometry, a point group in three dimensions is an isometry group in three dimensions that leaves the origin fixed, or correspondingly, an isometry group...