Dipole for cis-dichloroethene

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Dipole for cis-dichloroethene

Postby JennyCKim1J » Mon Nov 13, 2017 1:04 pm

For cis-dichloreothene, I understand that there is a dipole arrow (force? what's the exact term for this) between C-Cl, but should we be thinking about C-H as well or is it just ignored completely?

Kendall Schemmer 1I
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Re: Dipole for cis-dichloroethene

Postby Kendall Schemmer 1I » Mon Nov 13, 2017 2:00 pm

The dipole "arrow" you are referring to is called a vector because it has direction. As far as including the C-H bond in the analysis, the C-Cl bond has a much greater difference in electronegativity. The C-Cl bond is going to contribute much more to the polarity of the molecule. Once you have established that there is at least one polar bond in the molecule that is not cancelled out (as we did with the C-Cl bonds) the entire molecule becomes polar.

Michelle Lee 2E
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Joined: Thu Jul 27, 2017 3:01 am

Re: Dipole for cis-dichloroethene

Postby Michelle Lee 2E » Mon Nov 13, 2017 7:41 pm

For the cis-dichloroethene and trans-dichloroethene, did Dr. Lavelle say which one had rotational ability? Both have carbon and carbon linked by a double bond, so wouldn't both forms have pi-bonds and both can't rotate?

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