Experimental evidence for the charge delocalization shows an increase in the IR absorption frequencies of the C-O ligands present in the cations compared to those in the parent alcohols. Also, when the cation is formed the central carbon is rehybridised from sp3 to sp2 Orbital hybridisation. This causes the atoms to exhibit a trigonal planar arrangement and shortens the covalent bonds around the central carbon in the cation due to the increase in S character.
Experimental evidence of charge delocalization demonstrates that IR absorption frequencies for C-O ligands are elevated in cations relative to parent alcohols. Additionally, when forming a cation, the central carbon undergoes rehybridization from sp3 to sp2, resulting in a trigonal planar arrangement and shorter covalent bonds around the central carbon due to increased s-character.