Avinash
Last Activity: 9 Years ago
Delocalised bonding is when pi-electrons are 'spread out' over an entire pi framework rather than localised between two specific nuclei.
All but the 1,4 pentadiene will exhibit 'delocalised bonding', as in this case the double bonds are too isolated to interact. Generally, if conjugated pi bonds are present, then the single bond will be both stronger, and shorter.