Ok sir. I'll ask it on Chem.SE. I was afraid to ask there initially, as I got comments criticising the concept of resonance stating that it's outdated.
Even if it's outdated we're supposed to learn them.
@JohnRennie: May I know why servers are unstable? Or what causes them to crash?
Although I'd expect the barrier to be lower than a double bond because with a triple bond it only takes a quarter turn to recreate the bonds rather than a full turn.
But, now I realised, that "quarter turn" isn't possible due to different in phase of the orbitals. So will the final outcome change or will it remain the same?
Earlier, I understood this based on the following image (without the indication of different phases)
Now, it seems the "cylindrical symmetry" will not hold true. I think due to difference in phases, there will be two half hollow cylinders with opposite signs.
