electron density Watch

utv
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does a higher electron density cause stronger bonds.

if so why as I thought this was only a measure of probability.

or is it to do with another factor
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Kellyhigh235
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Higher elctron density means higher attraction to nucleus. Harder to pull electrons so a high force is required to over electrostatic force between electrons and the nucleus leading to higher stability and this would lead to the idea that they have stronger bonds Understand?
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TajwarC
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(Original post by utv)
does a higher electron density cause stronger bonds.

if so why as I thought this was only a measure of probability.

or is it to do with another factor
Bonds occur through orbital overlap between atoms - a high electron density means you have a high probability of "finding electrons" within the orbital. If there is more electron density within the orbitals that are involved in bonding (aka overlap with orbitals of correct symmetry on the other atom) then the bond will be stronger
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Kellyhigh235
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(Original post by TajwarC)
Bonds occur through orbital overlap between atoms - a high electron density means you have a high probability of "finding electrons" within the orbital. If there is more electron density within the orbitals that are involved in bonding (aka overlap with orbitals of correct symmetry on the other atom) then the bond will be stronger
ok. This is the right answer I guess. Somthing to do with benzene and arenes.
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utv
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yes this is why then sigma bonds are the strongest. because the orbitals overlap and have the highest possible electron density ? thanks for your reply
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Kellyhigh235
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(Original post by utv)
yes this is why then sigma bonds are the strongest. because the orbitals overlap and have the highest possible electron density ? thanks for your reply
yeh good luck!
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utv
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is this the reason why sigma bonds are stonger then pi or is this due to the overlapping being at an angle
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utv
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thanks guys for your help 😁
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TajwarC
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(Original post by utv)
yes this is why then sigma bonds are the strongest. because the orbitals overlap and have the highest possible electron density ? thanks for your reply
It's to do with the shapes of the orbitals on the different atoms, in sigma bonds, there is more overlap between the orbitals than any other bonding (again due to the shape/symmetry of the orbitals) therefore the bond is strongest. Its because sigma bonding takes place through s (or sp hybridised) orbitals which are "basically" spherical therefore overlap is always going to be somewhat good
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