Task

2-Methylbutane was reacted with bromine in light (1 : 1 mole ratio). The main product was isolated and heated with alcoholic potassium hydroxide. 1) Using 2-methylbutane, write the radical chain mechanism of alkane halogenation (initiation, propagation and termination) with equations. 2) Write structural formulas and names of all possible monobromo derivatives. 3) Identify the main product and explain it in terms of radical stability. 4) Write the reaction of the main product with alcoholic KOH and, using Zaitsev’s rule, show which alkene predominates. No calculations are required: for each part give the reaction equations (with structural formulas), conditions, names of substances and the necessary explanations.