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Which reagent is required for this reaction? -PPh EPPhe -PhaP =Ph₂P А B с D A...
Which term describes the relationship between these two structures? OH O A. diastereomers OB. enantiomers O C. tautomers OD. resonance structures QUESTION 15 What is a major product of this reaction? 1) DIBAL 2) H2O OH OH OH OH A B D OA OB ос D
Which of these compounds is most reduced? он Н он он Он А B с D СА ОВ OD Which reagent(s) when reacted with 1-ethylcyclohexene results in this product? OH OH A. 1. m-CPBA 2. H20/H307 B. Cold dilute KMn04 C. Dilute H2504 OD. 1. Os04 2. Na2SO3 Which is an intermediate in this reaction? HBr Br Br Br A B C D A B с D
Which proton would be abstracted first when this compound is treated with NaNH2? OH B H D H3C A с А B C D Which method will accomplish this transformation? å-a O A. 1. BH3.THE 2. H202, OH 3. EtBr B. 1. EtMgBr 2. H20/H30+ OC. 1. EtzCuli 2. H2O/H30+ OD. 1. HBr 2. EtLi
23 12 15 10 15 5 1st Choice А D C с B D 2nd Choice B A D D D А 3rd Choice C С A B А C 4th choice D B B А С B Using the plurality with elimination method, which of the following situations would result in winning the election in round two? Select the correct answer below: OC, after receiving 20 additional first choice votes with no other additional votes given None of these...
Which compound is in each reagent a b c d and explain what is happening between each reagent OH Excess H2O heat TBS-CI ro Br A 1. PPh; B 2. RSB (Butyllitium) & Pyridine base & H3O+ catalyst OH III IV Br Ph3P
What is the starting material of this reaction? MeOH ? Нt он A B с D А B ОООО D Which structure is NOT aromatic? :Br: 0 + B- А B C D ОА B C OD
42. Which mechanistic step is INCORRECT for this reaction? O= OH (D) H + OH — 43. What is the major product of this reaction? HgC Ph SCH нот NaOET ЕОН, А | Phu Ph CH₂ (A) B) H₃ C CH (B) H₃C . - H Ph CH₂ - PH CH₂ 44. Which reaction conditions will accomplish this transformation? (A) H2, Pd/C (C) Na, NH3(1) (B) H., Lindlar's catalyst (D) H:0, H2SO.
Which of the following compound will undergo both Syl and Sp2 reaction? OTS OTS A B с OTS D TSO C A B D What is the major product of the following reaction? Br NaOCH3 (xs) Br DMSO OCH; OCH3 A OCH, OCH3 B D H3CO Br с н,со Br Oc ОА OD OB What is/are the major product(s) of the following reaction? Br H2O A OH OH OH A B only c D D B What is the major...
С. D. Which of the following sequences of reagents will be used to do the following transformation? он Он А. 1. KOtBu; 2. Hg(OAc)2, H2O; 3. NaBH 1. TsCl, pyr; 2. KO B ; 3. BH3-THF; 4. H202, NaOH 1. H2SO4, heat; 2. Hg(OAc), H2O; 3. NaBH 1. TsCl, pyr; 2. NaOH; 3. BH3 THF; 4. H202, NaOH В. С. 8. Select the best reagents for the reaction below. Br Br Na ? А. 1. OsO4; 2. NaHSO3, H20 В....
1. Circle the aromatic compound NH :NH с D А B 2. Which one of the following compounds is more raath E