CHEM 1007 Study Guide - Reaction Mechanism, Sigma Bond, Bromine
Document Summary
Are hydrocarbons that contain a carbon-carbon double bond. Are unsaturated does not have the maximum number of hydrogen possible. Numbering of the carbon atoms begin at the end closest to the double bond. (double bond gets the lowest number) Double bond does not need a number as numbering starts from the double bond. Numbering of double bond is required if there are more than 1 double bond. Rotation around double bond is prevented by high energy barrier; therefore some alkenes exist in 2 forms. Are not possible for alkenes that have identical substituents attached to one of the carbons. They can interconvert only when the molecule absorbs sufficient heat or energy to cause the bond to break. Must have 2 different groups on the one carbon. Must have the same atom/group on the opposite side of the double bond. E =2 high priority groups on opposite sides. Z=2 high priority groups on the same side.
