So, that bends the axial fluorines together a bit. Note though that the structure is distorted a bit due to the repulsive forces of the lone pair of electrons you see (not bonded). With one lone pair of valence electrons, you get a seesaw molecular geometry. Therefore, you can put 6x4 on each fluorine, 2x4 to account for four single bonds, and 2 for the last 2 valence electrons available.Īs a result, you have 5 electron groups, so the electron geometry would be trigonal bipyramidal. You can put sulfur in the middle because fluorine tends to make single bonds. Fluorine atoms on the equatorial positions have the bond angles of 102 degrees, and the axial ones have 173 degrees, which are a little different than the trigonal bipyramidal molecular geometry leading to. Within the context of VSEPR theory, you can count electrons to determine the electron geometry ("parent" geometry). The central sulfur atom forms four bonds with the neighboring fluorine atoms and has one lone pair of electrons.
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