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Hi I am confused as to what dipole induced dipole interactions are. Non polar and polar molecules interact with one another though according to the text, though it says that this is almost like a "permanent" moment? what does that mean and what properties does a molecule have to have to induce a another molecule into a dipole interaction?
when one molecule has a dipole, it means that there is a partial positive charge on one atom, and a partial negative charge on some other atom of the molecule. these partial charges attract or repel the electrons of nearby molecules' bonds. So, if there is a polar molecule with a dipole, the partial charges from that dipole will create a small charge difference in a nearby nonpolar molecule because its charge will effect the electrons in the nonpolar molecule's bonds.
Electrons move around a lot so there could be small moments in time where all the electrons are on one side of the atom and none on the other side making one side partially negative and the other side partially positive. These partial charges can induce another atom to have partial charges as well, as the partially negative side of the first atom will repel the electrons of the second atom away, giving the second atom a partially positive charge. These forces are generally very weak which is what I think the textbook meant by other bonds being more "permanent".
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