Which of the following carbocations is(are) likely to rearrange? CH3 CH3 CH3 CH3 CH3, OCH2 CH3 CH3 II II IV Select one: O II, IV O all of them O II, IV
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- Arrange the following carbocations in the order of increasing stability (least stable to most stable): Me Me Me+ Me A B D https://ibb.co/XKFD1G6 OCThe highest energy and be not stable of the following carbocations is: O ČH2 CH3 CH3 CH3 II III IV I O IV OAll ara nArrange the following alkenes in order of increasing stability (least stable to most stable). I3D II IV O IV < III < II < | O II < IV < |I < | O IV < || < |II < | O III < II < | < IV O Il < IV < I < III MacBook ProWhich of the following carbocations would you expect to rearrange? CH3 CH3 CH3 CH3CHCHCH3 + A B C O A ОВ O CH3 CH3CCH₂CH3 D MacBook AirWhich of the following carbocations is the most stable? A B D A B MeO C O₂N DIdentify. SN1 CI SN1 SN1 Br "|||| CH3CH₂O Na CH3CH₂OH Br SN2 H3C `ONa+ DMSO SN2 t-BuOK t-BuOH SN2 E1 E1 E1 major product E2 E2 E2Q6 Show how you would accomplish the follwoing transformations. (a) 2,2dibromobutane to but-1-yne (b) but-1-yne to oct-3-yne (c) trans-hex-2-ene to hex-2-yne (d) cyclodecyne to cis-cyclodecene (e) cyclodecyne to trans-cyclodecene (f) hex-1-yne to hexan-2-one, CH3COCH₂CH₂CH₂CH3 (g) hex-1-yn to hexanal, CH3(CH₂)4CHO (h) trans-hex-2-ene to cis-hex-2-eneFor each of the following reactions, draw the skeletal structure(s) of the most stable conformer for the major expected product(s) for the reaction. ОН KMNO4 a) Н2О/МеОН, 0°С OH Br Охопе Br b) Acetone/H20, 0° ОН OH KMNO4 c) Н2О/МeОН, 0°С OHIdentify ALL compounds DO NOT undergo highly favorable rearrangements a different carbocation isomer. ✔A B C D E A B C D EFor each reaction, decide whether substitution or elimination (or both) is possible, andpredict the products you expect. Label the major products. chlorocyclohexane + NaOCH3 in CH3OHK Draw one of the two diastereomers that are the major products from this reaction. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, Ignore inorganic byproducts. 1 Br2 Drawing V I I Probler Atom and || Br3. Assign E or Z stereochemistry to the following alkenes: (a) НОСН2 CH3 (b) HO2C H C=C C=C H3C CI OCH3 (c) NC CH3 (d) CH3O2C CH=CH2 C=C C=C CH3CH2 CH2OH HO2C CH2CH3 4. Classify the following reactions as additions, eliminations, substitutions, or rearrangements: (а) CН3Br + KоН — СH3ОН + KBr (b) CH3CH2C1 + NaOH → (c) H2C=CH2 + H2 H2C=CH2 + NaCl CH3CH3 5. Which of the following are most likely to behave as electrophiles, and which as nucleophiles? Explain. (a) NH4+ (b) C=N- (c) Br+ (d) CH3NΗ, (е) Н—С—С-—нSEE MORE QUESTIONS
