noiseytoucan
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I have a homework question that says "State and explain the effect a single Be2+ ion would have on a Cl- ion, and explain how the above effect would lead to the formation of a covalent bond". I don't know if the question means the ions form covalent bonds with other species, but probably not.
I thought that the ions would just be attracted together like any other ionic bond and form BeCl2, but that doesn't explain why it would lead to a covalent bond. If this covelant bond is with another species my best guess would be that some sort of dative covelant bond, but I am still not sure what the 'above effect' is.
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charco
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(Original post by noiseytoucan)
I have a homework question that says "State and explain the effect a single Be2+ ion would have on a Cl- ion, and explain how the above effect would lead to the formation of a covalent bond". I don't know if the question means the ions form covalent bonds with other species, but probably not.
I thought that the ions would just be attracted together like any other ionic bond and form BeCl2, but that doesn't explain why it would lead to a covalent bond. If this covelant bond is with another species my best guess would be that some sort of dative covelant bond, but I am still not sure what the 'above effect' is.
Be2+ is very small, which means that it has a very high charge density (charge/volume) and hence polarising ability.

It can polarise the chloride ions electron pair back towards itself resulting in a shared pair of electrons (covalent bond)
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noiseytoucan
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(Original post by charco)
Be2+ is very small, which means that it has a very high charge density (charge/volume) and hence polarising ability.

It can polarise the chloride ions electron pair back towards itself resulting in a shared pair of electrons (covalent bond)
Thank you, I don't think I've come across this before but it makes sense now!
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Medic Mind
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