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distinguishing dipole moments

Posted: Sun Nov 25, 2018 3:42 pm
by CaminaB_1D
Can someone explain to me how we know there is a dipole moment in terms of bond vectors? perhaps an example as well?

Re: distinguishing dipole moments

Posted: Sun Nov 25, 2018 3:46 pm
by cara_cavarretta_3F
Vectors having to do with dipoles denote the direction of charge going from positive to negative or negative to positive. In the molecule H20, attached is a picture of the vector of the bent molecule in which the vector goes from the positive upward bent hydrogen atoms down to the downward negative oxygen atom, making this a dipole. In the case of CO2 however, the vectors both go out toward the linearly bonded oxygen atoms, and the vectors cancel each other out so there is no dipole moment. https://chem.libretexts.org/@api/deki/f ... revision=1