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I showed your answer to my teacher who said that covalent bonding is considered the strongest because it has Hydrogen bonding which is the strongest intermolecular force. She also said ionic bond has dipole dipole forces which are less strong than H-bonding.

Does this make sense? I always thought H-bonding was a certain type of bonding that occurred in some covalent compounds, not all of them.
Biochemistry and Chemical Biology Forum / question on how to count odd
« Last post by frantix on Today at 02:58:03 PM »
You can't use macroscopic properties as an indication of bond strength on a per bond basis, which we might define as the amount of energy it takes to separate two nuclei from their equilibrium bond length to infinite separation. The reason is that a property like boiling point are dependent on the amount of energy per bond and the number of bonds present across some defined volume or mass unit.

Direct comparisons on a per-bond basis are honestly difficult and not particularly meaningful, because ionic compounds tend to exist as aggregate lattices composed of networks of ionic nuclei whereas as you have noted covalent bonds usually exist in discrete molecules connected by weaker intermolecular forces. I believe the conventional general chemistry wisdom is that covalent bonds are stronger, but it's probably one of these things that needs to go away because it leads to some misleading conceptions of bonding in students. Aside from which, nonpolar covalent and ionic bonds are more like extremes along a spectrum rather than discrete and absolute things. At what point does a bonding relationship go from highly asymmetric sharing of electrons (very polar covalent) versus complete localization on one nucleus versus the other (ionic)? Bond strength depends on so many things, to boil it down to ONE class is always stronger than the other is doing a disservice to students.

You could probably argue your case on grounds such as these, but it may not be worth your time.

This was a question on one of my chemistry tests and the teacher had the correct answer as being covalent bond is stronger then ionic bond. I did some research and I got conflicting answers some said covalent were stronger and some said ionic were stronger.

I think it personally makes sense that ionic bonds are stronger since they typically have a higher boiling points which I have been taught is an indicator of intermolecular bonding strength.

Most ionic bonds are almost always solid at room temperature, like NaCl. However many covalent bonds such as H2O and O2 are either liquid or gas. So wouldn't this mean that ionic bonds form stronger bonds?

Thanks, Jack 

Hey guys, I have the task of comparing the synthesis of benzimidazole and benzothiazole from 1,2-phenylenediamine and 2-aminothiophenol. So far i have found that in general, benzimidazole  formation  takes relatively  longer  time  for  completion  as  compared  to  the  time required  for  benzothiazoles due to the reduced  nucleophilicity  of  –NH  moiety as compared to sulphur atom. Also benzimidazole synthesis does require a stronger oxidant and harsh reaction conditions. Does anyone have any other ideas and examples? Thank you
You have not mentioned biochemistry, and I would probably tackle this subject after organic chemistry.  Before reading a biochemistry textbook, I might read a book such as PDQ Biochemistry or an equivalent book, in order to get a general feel for the important topics.

Thanks for the comment.
As I mentioned, Biochemistry class will be in Fall 2021, so I will have summer time to get prepared.
For now my challenge is how and where to start from scratch and proceed my self study for the next three months, to be ready for Organic Chemistry 1 class.
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