Addition of Br 2 , Diols, and Cleavage of a double bond. Addition of Bromine. Bromine adds across a double bond in a trans- fashion. Creates a “bromonium” ion as an intermediate with two bonds to two different carbons, one longer than the other. Mechanism (Addition of Br 2 ).
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Bromine adds across a double bond in a trans-fashion.
Creates a “bromonium” ion as an intermediate with two bonds to two different carbons, one longer than the other.
A cis-diol is a diol where both –OH groups are pointing in the same direction.
There are two ways to create a diol, with either osmium tetroxide (OsO4) or cold, dilute permangante (KMnO4).
Double bonds are cleaved by either warm, concentrated KMnO4 and Ozone (O3).
The ends are left as either ketones, aldehydes or carboxylic acids.