Question

What are typical bond lengths for `C-N`, `C=N`, `C-=N`, bonds...how does this relate to bond order?

Answer 1

`"the bond order increases....."`

Explanation:

and the `C-N_"bond length"` decreases....

Typical values for `C-N`, `C=N`, and `C-=N` bond lengths are `1.47xx10^-10*m`, `1.28xx10^-10*m`, and `1.14xx10^-10*m`, respectively.

In a quaternary ammonium salt, i.e. `R_4N^+`, the `C-N` bond distance is approx. `1.55xx10^-10*m`.

This forms a nice parallel with `C-C`, `C=C`, and `C-=C` bond lengths.