Question

4 (6 pts) For each of the following compounds, indicate which statement (A-E) best describes the reactivity of the benzene ring in electrophilic aromatic substitution reactions (e.g., nitration). A. The ortbo and para positions are activated and the meta position is deactivated. C. The ortho and para positions are deactivated and the meta position is activated. A. All positions are activated -ortho and para are more activated than meta. D. All positions are deactivated -ortbo and para are more deactivated than meta. E. All positions are deactivated-ortho and para are less deactivated than meta. CH2CH3 Br CHy Answers: 5 (5 pts) Answer one (a or b) of the following questions - if you attempt both questions clearly indicate the question you do not wish to be graded. Showing structures will be helpful in your explanations. a. For the following reaction, indicate (e.g., circle) which of the products shown will be the major product of the reaction and explain why that product is expected to be the major product-be specific. на or b. For the following reaction, indicate (e.g., circle) which of the products shown will be formed in the greater yield of the reaction and explain why that product is expected formed in a greater amount- be specific. HO or (one equiv)

Answer 1

. Although -Br is deactivating group, but on nitration it gives a minture & Br A; This is electron donating ortho and para actirated and tI effect c; This is electron aksine withdrawing group ortho and para deactivated and meta - position activated. - your prode formed I because there are 2 types of dectrophilies o is least stable than 6 a and a destasitize the carbocaran became odd is formed. (tertiary I effect, it will carbon cation). PAGE

en de -10000 DATE 0 Yos recogance staklibiction F has and resonance stabilization also it is allylie on Fr e sh cansocation. 6 is secondary Carbocation. I so, Fra is major.