Can metals covalently bond with non-metals?

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itsConnor_
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#1
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#1
Hello,

So, I was under the impression that metals and non-metals only bond ionically. However, Jssoussou mentioned the covalent bonding of Be and Cl...

https://www.youtube.com/watch?v=PU9D...K5OnU2SwDrqGRc (near start of video)

Would someone care to enlighten me?

Many thanks.
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charco
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(Original post by itsConnor_)
Hello,

So, I was under the impression that metals and non-metals only bond ionically. However, Jssoussou mentioned the covalent bonding of Be and Cl...

https://www.youtube.com/watch?v=PU9D...K5OnU2SwDrqGRc (near start of video)

Would someone care to enlighten me?

Many thanks.
Yes they can. There is a massive field of organometallic chemistry for instance.

On a more mundane level anhydrous aluminium chloride is covalent at room temperature and above.
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lerjj
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#3
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#3
(Original post by itsConnor_)
Hello,

So, I was under the impression that metals and non-metals only bond ionically. However, Jssoussou mentioned the covalent bonding of Be and Cl...

https://www.youtube.com/watch?v=PU9D...K5OnU2SwDrqGRc (near start of video)

Would someone care to enlighten me?

Many thanks.
There's a continuous spectrum from ionic to covalent, depending on how well separated the charge is (fully ionic=fully separated, fully covalent=completely shared).

So all you need is a metal that's got a lot polarising power, i.e. small and highly charged e.g. Be or Al and a non-metal that's not that electronegative i.e. large e.g. I.

I wonder what type of bonding BeI has...
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charco
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(Original post by lerjj)
There's a continuous spectrum from ionic to covalent, depending on how well separated the charge is (fully ionic=fully separated, fully covalent=completely shared).

So all you need is a metal that's got a lot polarising power, i.e. small and highly charged e.g. Be or Al and a non-metal that's not that electronegative i.e. large e.g. I.

I wonder what type of bonding BeI has...
BeI2 would be covalent ...
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Kallisto
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Yes, it is. It is possible, if the charge difference (electronegativity) between the non-metals and metals is not to high. Otherwise the attraction of one of the charge is so strong that electrons will be donate and accept by one of the atoms, and then its an ionic bond.
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sehrish_akhtar
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not all...just Aluminium Chloride, as it has some covalent character
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Suts96
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#7
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There is no such thing as a 100% ionic compound. Since polarisation of ions and ions are not perfect point charges, there is always a slight degree of covalent character.

Whilst some ionic compounds have such a difference in electronegativity that we can assume completely ionic bonding, this technically is not totally true.
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