Monthly Archives: January 2013

A Dibromination Dibromance Part IV

We divided the procedure into three different studies. One study involved the “traditional” use of 1 mL of concentrated HBr and H2O2. The second study mixed 0.5 mL of HBr and 0.5 mL of HCl, and the third study used 1 mL of HCl. The products were recovered by neutralizing the reaction mixture and collecting […]

A Dibromination Dibromance Part III

The protocols for the in situ formation of bromine from hydrobromic acid and hydrogen peroxide and subsequent reaction with an alkene vary somewhat in the literature. If the alkene can be dissolved in a water-miscible solvent such as ethanol, then the reaction can be done without a phase transfer compound. For example, trans-stilbene is dissolved […]

A Dibromination Dibromance Part II

Another interesting aspect to the dibromination reaction is that three different methods have been developed to perform the same reaction in the undergraduate laboratory. Of course, many more methods of dibromination exist in the chemical literature. Some laboratory manuals, such a Nimitz, still propose the dibromination reaction using diatomic bromine in a halogenated solvent such […]