CHE E122 Lecture Notes - Lecture 25: Unsaturated Hydrocarbon, Chemical Formula, Alkene
Document Summary
Unsaturated hydrocarbons contain carbon- carbon double or triple bonds (more hydrogens can be added) Alkene: an unsaturated hydrocarbon that contains one or more carbon-carbon double bonds. The molecular formula of this group is cnh2n (n is the number of carbon atoms). Alkenes belong to a homologus series of organic compounds in which the members differ bya constant molecular mass of 14 that is ch2. The suffix = -ene is added to the prefix indicating the longest carbon chain. In the carbon-carbon double bond, two pairs of electrons are being shared, leaving the carbon free to bond to two other atoms. Identify and name the longest continuous chain of c atoms which contains the double bond(s) (no of c +-ene): step 2. Locate the double bond by the lower- numbered carbon atom joined by the double bond (e. g. , 1-butene): step 4. Locate and name attached groups: step 5.
