Question

7. What is the major product of the following reaction? 1. 03 2. MeS a. b. H H and and d. None of the above and What is the major product of the following reaction? HBr SCH3 d. None of the above C. What reagents/steps are required to complete the following conversion? ?? a. 1. Brz 2.03 3.MeaS 4.NaOH, 5. Jones' Reagent b. 1. Na, NH3, 2.03. (CH3)26, 4. ??? c. 1. Lindlar's catalyst, H2, 2. Os 3. (CHb)2S, 4. PCC d. None of the above 10 An unknown compound is treated with P/H2 to give cyclooctane. The same unknown material is treated with ozone followed by dimethylsulfide to give a 3 carbon dialdehyde and a 5 carbon dialdehyde. What is the structure of the unknown? a. b. d. None of the above

Answer 1

7) It will cleave the double bonds and will perform partial oxidation till ketones or aldehydes. So the correct answer will be part a

8) Substitution wont take place as the substitution process takes time As soon as the H+ and Br- are formed, H+ will quicly attack the double bond and make a carbocation, which will now reorganise in a slow manner. So we will visualize addition and then rearranging to form the most stable carbocation, which gives part a as the answer

9) First addition of H2 to make it alkene, followed by cleaving the bond and oxidizing. The answer is Part C

10) The distance between carbons should be 3 carbon and 5 carbon to get the desired alkene. And there should be 2 double bonds as 2 dialdehydes are formed. So the answer is part a