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Which of the following carbocations is(are) likely to rearrange?
a. I
b. II
c. III
d. II and III
e. I and II
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- 1. Which among these would be the most stable carbocation?a. Allylicb. Vinylicc. Primaryd. Secondary2. What is the primary reason for the stability of tertiary carbocations?a. Free rotationb. Resonancec. HyperconjugationWhich rearrangement would the two example of carbocation below most likely undergo? a. Methyl shiftb. Hydride shiftc. Paradigm shiftd. Equilibrium shift9. Draw the transition state for the following SN2 reaction. (please see attached screenshot). A. I B. II C. III D. IV
- Match the species with the description of its reactivity. alkene chloride 1. nucleophile carbocation 2. electrophile HCIWhich of the following carbocations is likely to undergo rearrangement through a methyl shift? A. I B. II C. III D. I and II E. II and IIIA terminal alkyne (RC=CH) is exposed to excess HBr. What rule should be followed to determine the placement of the halogen atoms in the product? A. Markovnikov rule O B. Hofmann's rule O C. Zaitzev's rule D. Anti-Markovnikov rule
- The synthesis above can be performed with some combination of the reagents listed below. Give the necessary reagents in the correct order. Be sure to consider stereochemistry and regiochemistry.A. NaOHB. mCPBAC. OsO4, tBuOOHD. NaHE. H2, LindlarF. CH3CH2CH2BrG. CH3CH2ClH. NaNH2I. H3O+J. Na, NH3(l)2. Draw ALL possible structural and stereochemical (if applicable) isomers. Please include enols (if oxygen is present) and enamines (if nitrogen is present), and any E and Z isomers in this analysis. a. C₂H4O b. a. C₂H₂O C. b. C4H₂O C₂H₂NItem 2 Draw the organic products formed in each reaction. Consider both substitution and elimination products, if possible. Indicate the type of reaction that happened (SN1, SN2, E1, E2). Include stereochemistry and regiochemistry if relevant. For multiple products, identify which is the major and which is th]e minor product. a. b. C. d. e. H₂C 9H **** CH3 CH₂CH3 Br Br CH₂CH C6H5 Br -OC(CH3)3 OC(CH3)3 CH3CH₂OH TOH CH₂OH
- Which of the following is the major product of the following reaction? HBr ... (the major product is based on the most stable carbocation intermediate that was formed in the middle of the reaction) A D ÇH3 Br Br H3C. H3C. H3C. *CH3 CH3 CH2 Br `CH3 BrWhich is the major isolated organic product of this reaction sequence? C B C₂H₂ C3H₂ 1. NaNH, 2. CHI;Br 3. Lindlar's cat., [₂ 4. mcpba (B) C₂H₂ (D) C3H7¹Draw the most stable resonance form for the intermediate in the following electrophilic substitution reaction. Ⓒ. CCl₂ • You do not have to consider stereochemistry. . Include all valence lone pairs in your answer. . In cases where there is more than one answer, just draw one. Bo H₂SO4 First stage in synthesis of the insecticide DDT, which is now banned in the US #₂ SAIF CI OH CC13