A student Al Lillich has prepared a pure sample of 3-bromo-1-butene (A). Several weeks later he finds that the sample is contaminated with an isomer B formed by allylic rearrangement. (a) Give the structure of B. (b) Draw a curved-arrow mechanism for the formation of B from A. (c) Which should be the major isomer at equilibrium, A or B? Explain.
Chapter 4: Week 7 9/27-29/16 Chapter 4: Stoichiometry of Chemical Reactions Part 3: Reaction Classification and Stoichiometry and Quantitative Analysis Chemical Reaction Names Combination Reaction – two reactants form one product NH (3) + HCl(g) NH Cl(s) 4 Decomposition Reaction – a reactant decomposes into two or more products CaCO (s) CaO(s) + CO (g) 3 2 Combustion Reaction – a reaction where a substance containing C, H, and (sometimes) O is burned in the presence of oxygen to produce only CO 2nd H O2 CH O2l) + O (g) 2 CO (g) + H 2(l) 2 Disproportionation Reaction – a redox reaction that consists of an element that under
