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Determining a Dipole Moment

Posted: Sat Nov 17, 2018 9:43 pm
by Kathryn Wilhem 1I
I am confused on what is used to determine whether an atom is positively or negatively charged in a dipole moment. Is it related to formal charge?

Re: Determining a Dipole Moment

Posted: Sat Nov 17, 2018 9:54 pm
by Kevin ODonnell 2B
The dipole charge has to do with electronegativity. The more electronegative atom has a partial negative charge since it pulls the electrons closer to itself. While, the less electronegative atom is partially positive since the other atom is holding the electrons more tightly.

Re: Determining a Dipole Moment

Posted: Sat Nov 17, 2018 10:06 pm
by Mhun-Jeong Isaac Lee 1B
So for example, in C2H2Cl2, C is bonded to Cl. The Cl would be more negative because it has a higher electronegativity, it wants electrons more than the C. Thus, the C would be more positive. These are the positive and negative dipole moments.