(Polar molecules, Non-polar molecules, etc.)

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Postby SantanaRodriguezDis1G » Sun Nov 26, 2017 7:03 pm

Can someone please explain to me why part a of number 11(sulfur tetrachloride) in chapter 4 is trigonal bipyramidal instead of seesaw?

Emily Oren 3C
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Re: 4.11

Postby Emily Oren 3C » Sun Nov 26, 2017 7:34 pm

The answer book says that the "arrangement of electron pairs will be trigonal bipyramidal ... the actual structure is described as a seesaw" for this problem (page 98). When classifying the shape of a molecule we do not count lone pairs, so we get seesaw, but if we did count lone pairs as part of the shape, then we would get trigonal bipyramidal. So the sulfur tetrachloride is a seesaw shape, not trigonal bipyramidal.

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