Question

compare the nitrogen-oxygen bond lengths in NO2+, and in NO3-. In which ion are the bonds...

compare the nitrogen-oxygen bond lengths in NO2+, and in NO3-. In which ion are the bonds longer?

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Answer #1

The difference is that NO2+ has 2 double bonds and NO3- does resonance. Sometimes the double bond is in position 1 then position 2 then three. The actual length of the bond is an average of the three, this makes the overall bonds a little longer than NO2+ which is always just a double bond. Actual empirical measurements have proved that in NO3- the actual bond lengths are equal in length, that is how they know that the double bond is shared amongst the three positions.

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