General Formula: CnH2n, n = 2, 3, 4, ….
First 3 Members:
- Alkenes are unsaturated hydrocarbons.
- Alkenes are a family of hydrocarbons (compounds containing carbon and hydrogen only) containing a carbon-carbon double bond. Therefore, alkenes are unsaturated hydrocarbons.
- The general formula for alkene is CnH2n where n = 2, 3, ….
- There is no single carbon alkene because it need at least 2 carbon to form the double bond. Hence “methene” doesn’t exist.
- As alkane, the name of straight chain alkenes is also made up of two component parts, the stem and the suffix.
- We use the same code for the stem, as the alkane.
- The suffix for alkene is “ene”.
- Table below shows the molecular formula and name of the first six alkenes.