Does being more polarizable= Being stronger?
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Does being more polarizable= Being stronger?
In regards to the example of CH4 and CCl4, CCl4 has a higher boiling point. This is because it has more electrons and is more polarizable, so does this mean being more polarizable means being stronger? Also, F2 and Cl2 being gases at room temp, while Br2 is a liquid and I2 is a solid. Does this follow the same logic?
Re: Does being more polarizable= Being stronger?
High polarizability means that the electron cloud can easily be distorted or electrons are more easily pulled away from the central atom. They form bonds with greater covalent character because the electron is pulled further between the two bonding molecules. As polarizability increases, the dispersion forces become stronger, therefore molecules are attracted to each other more strongly accounting for an increase in melting and boiling point. So, you could say that higher polarizability means stronger bonds.
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Re: Does being more polarizable= Being stronger?
High polarizability creates stronger bonds which is why ions with bigger atomic radii (higher polarizability) like Br2 and I2 are not gases
Re: Does being more polarizable= Being stronger?
As polarizability increases, the interaction potential energy increases, which we can see in the equation Ep=alpha1*alpha2/r^6. A large molecule with many e- is more polarizable than a smaller molecule with less e-, so the larger molecule is going to have stronger London interactions than the smaller molecule. Highly polarizable molecules have large instantaneous dipole moments and thus strong London interactions.
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Re: Does being more polarizable= Being stronger?
Chris Qiu 1H wrote:High polarizability creates stronger bonds which is why ions with bigger atomic radii (higher polarizability) like Br2 and I2 are not gases
Can you explain a little more why higher polarizability corresponds to stronger bonds? Thanks!
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Re: Does being more polarizable= Being stronger?
Anthony_Rio_3K wrote:Chris Qiu 1H wrote:High polarizability creates stronger bonds which is why ions with bigger atomic radii (higher polarizability) like Br2 and I2 are not gases
Can you explain a little more why higher polarizability corresponds to stronger bonds? Thanks!
Butting in here to say that higher polarizability means a bigger electron cloud that's easier to distort. They can more easily form dipoles since the electrons are not as tightly held to the positive charge of the nucleus.
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