| Addition reactions of electrophilic reagents to the alkene double bond are the most typical. |
| One highly characteristic reaction of aldehydes and ketones is nucleophilic addition to the carbon-oxygen double bond. |
| Since there are two atoms bound to the sulfur atom, there must be one double bond. |
| A double bond happens when two electrons are shared or exchanged in a bond. |
| On the other hand, in polar conjugated systems such as protonated Schiff bases the funnel shows a structure with just one twisted double bond. |
| The difference between the two structures is the location of the double bond relative to the single bond. |
