Coordinate covalent bond (1 Viewer)

[kawaiipotato]

https://9eeba4054ee764a743f35bb25b5...Grammar 2004 Chemistry Trials & Solutions.pdf

On page 42/57 of this PDF, question(ii) notes say not to use O3 as an example of a coordinate covalent bond, and to use NH4+ or H3O+ instead. Is there a reason why?

 

[porcupinetree]

https://9eeba4054ee764a743f35bb25b5...Grammar 2004 Chemistry Trials & Solutions.pdf

On page 42/57 of this PDF, question(ii) notes say not to use O3 as an example of a coordinate covalent bond, and to use NH4+ or H3O+ instead. Is there a reason why?

Afaik, the bonding in the ozone molecule is more complicated than the simple 'coordinate covalent bond' bonding suggested/described by the syllabus. My teacher mentioned it in passing when were doing CM&M in class - there's some info on this page under the heading 'structure of ozone': http://chemwiki.ucdavis.edu/Inorgan...:_The_Oxygen_Family/Chemistry_of_Oxygen/Ozone

 

[InteGrand]

Ozone is actually a resonance structure, which basically means it's changing between a few states (the ones on the ChemWiki page). So you'd actually be entirely wrong if you said it was a simple coordinate covalent bond. But then again, there are quite a lot of things in HSC Science syllabi that are entirely wrong.

 

[kawaiipotato]

But then again, there are quite a lot of things in HSC Science syllabi that are entirely wrong.

Maybe I've missed a few things but the one I remember that wasnt completely correct was a MC in physicswhere there were 3 conductors and it asked for the order of which the magnet passed through. The question didn't account for small eddy currents when a section of the conductor was removed
What other things are wrong in the syllabus?

 

[Drsoccerball]

Theres also actually one more type of bonding that has recently been discovered.

 

[kawaiipotato]

Afaik, the bonding in the ozone molecule is more complicated than the simple 'coordinate covalent bond' bonding suggested/described by the syllabus. My teacher mentioned it in passing when were doing CM&M in class - there's some info on this page under the heading 'structure of ozone': http://chemwiki.ucdavis.edu/Inorgan...:_The_Oxygen_Family/Chemistry_of_Oxygen/Ozone

In I and II, aren't they the same? Just rotations of each other? (In 3 dimensioms)

 

[someth1ng]

No, the bond actually flips over to the other side. It's fluctuating between those three states overall.

You're actually wrong there - it's not "fluctuating". If you draw all the resonance structures, they all exist at once so the actual bonding is an overall average of all the possible resonance structures (some structures contribute more than others).

 

[xbldzz]

g mfern g