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

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KatelinTanjuaquio 1L
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Postby KatelinTanjuaquio 1L » Sun Nov 18, 2018 6:48 pm

Why is CH2Cl2 polar? When I drew the Lewis structure, I put Cl opposite from each other and I thought that the dipole moments would cancel out, but it is normally drawn with the Cls next to each other. Is there something other than the drawing that makes it polar? How do I know to put them next to each other next time?

Ronak Singh
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Joined: Fri Sep 28, 2018 12:16 am

Re: CH2Cl2

Postby Ronak Singh » Sun Nov 18, 2018 7:08 pm

The shape of ch2cl2 is tetrahedral so the chlorine atoms are 109.5 degrees away from each other, not opposite from each other. This causes dipole moments towards the chlorine atoms which do not cancel.

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Re: CH2Cl2

Postby sonalivij » Sun Nov 18, 2018 7:22 pm

Also, the C-Cl bond is polar and since they are unable to all cancel each other eat (because there are C-H bonds thrown in there), the whole molecule becomes polar

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