January 25, 2021, 02:16:27 AM
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Topic: LiF vs CsF covalent character  (Read 171 times)

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Offline xshadow

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LiF vs CsF covalent character
« on: January 08, 2021, 06:28:00 PM »
Hi

I have a doubt about which one has the biggest covalent character

I think  LiF because:

-Li  more electronegative than Cs
-Li+ has a bigger charge density than Cs so it can polarize F- easily (more bond character)


BUT if I think at the  Pearson Hard-Soft  theary I know that hard-hard interactions are ionic while soft-soft covalent
Here Li is much more hard than Cs so LiF is hard-hard and should be more ionic than CsF( Cs is soft)....and so less covalent than CsF

Is it a contraddition?
THanks

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