Question

2-Bromo-2-methylbutane undergoes an E1 elimination reaction in the presence of ethanol. In the next reaction only one of the possible products is represented. Although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. Complete the mechanism and draw the missing substances.

Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the grid and connecting them with bonds, including charges where needed. Indicate the mechanism by drawing the electron-flow arrows on the molecules.

2-Bromo-2-methylbutane undergoes an E1 elimination reaction in the presence of ethanol. In the next reaction only one of the possible products is represented. Although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. Complete the mechanism and draw the missing substances. Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the grid and connecting them with bonds, including charges where needed. Indicate the mechanism by drawing the electron-flow arrows on the molecules.

Answer 1

El elimination reaction must have at least two steps. In first step, the alkyl halide dissociates, forming a carbocation The base forms the elimination product by removing a proton from a carbon that is adjacent to the positively charged carbon. O: +O H minor product