课程名称︰有机化学二 课程性质︰化学系大二必修 课程教师︰罗礼强 开课学院：理学院 开课系所︰化学系 考试日期（年月日）︰2021/4/8 考试时限（分钟）：110min 试题 : 1. Please name the following groups/compounds (a) CF3SO2O- (b) PhMgBr (c) SOCl2 (d) and (e): https://i.imgur.com/7SaUIpi.jpg 2. Which is the best combination to prepare ethoxycyclopentane via the Williamso n method? 3. Draw the structures of all the products formed when 1-methylcyclopentene is s ubjected to the hydroboration-oxidation sequence. 4. Apply the polygon-and-circle method to the following cyclopropenyl ions shown below, construct their MOs and whether they would be aromatic or not. https://i.imgur.com/t9ayQiH.jpg 5. Show how you might carry out the following transformations. More than one ste p may be required. You can use benzene and any other reagents with two or fewer carbons. https://i.imgur.com/JqjI95u.jpg 6. The Lewis structure of both pyridine and pyrrole have an electron pair on the nitrogen atom, suggesting that both substances might posses basic properties. H owever, only pyridine reacts readily with HCl to form pyridinium chloride, while pyrrole is rather unreactive. Explain clearly, using relative diagrams to illus trate/clarify your answer. https://i.imgur.com/6r7wEWr.jpg 7. Provide a mechanism to account for the following reaction. https://i.imgur.com/b8SHy9g.jpg 8. Predict the major organic product from each of the following reactions. https://i.imgur.com/xw2ZBC3.jpg 9. Provide a mechanism to account for the following reactions. https://i.imgur.com/Y4NjdIf.jpg 10. Azulene has an appreciable dipole moment. Write resonance structures for azu lene that explain this dipole moment and that helps explain is aromaticity. https://i.imgur.com/AqWYk1I.jpg 11. Please rationalize why the chemical shift of carbon (a) of the following com pound appears more downfield than that of carbon (b) in the C-13 NMR spectrum. https://i.imgur.com/rZ8ZYeD.jpg -- 愿使岁月静好，现世安稳。 --

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