Nitration of 1,4-dimethylbenzene (p-xylene) gives a single product having the molecular

Saturday, November 12, 2016 Organic Chemistry Elimination Reactions and Alcohols - Elimination Reactions • always used with heat or light • endothermic • Elimination reactions favor a Zaitsev position - Zaitsev- more substituted position - Hoffman- less substituted position • E1 reactions- 2 step process - E1 reactions favor tertiary positions - the leaving group is loss and a carbocation is formed - the product of E1 reaction will always be a Zaitsev position - the base is neutral • E2 reactions- 1 step process - can react in primary, secondary, or tertiary position - occurs in one step - the product of E2 reaction will usually be a Zaitsev position, unless the base is sterically hindered •