There are six bonded domains on S and no lone pairs, giving octahedral electron-domain and molecular geometries. 

Shown below is an octahedron, the geometric shape for which the term "octahedral geometry" was derived. The central atom lies at the center of the molecule. Four atoms lie in a common "square plane", forming 90 degree bond angles with the central atom. Two atoms are at 90 degree angles to the atoms lying in the square plane. With the "spin" on, note how the molecule rotates about an axis where four terminal atoms are in an equatorial positions, while the two additional atoms are at axial positions. However, there are no "true" equatorial and axial positions since the molecule is completely symmetrical. Turn the "spin" off and rotate the molecule into the plane of the screen to see how atoms you perceive as equatorial and axial swap positions. Then turn the spin on again to see the molecule rotate about the new "equator". Note how all the bond angles between nearest atoms are 90 degrees. Contrast this with a molcule with trigonal bipyramidal geometry, where the axial and equatorial positions are fixed, and two distinct bond angles are present between nearest atoms (120 and 90 degrees).



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Model type: Spacefill ball and stick stick only
Spin: Off On

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