Which of the following anions is the most nucleophilic in polar protic solvents? а. F- b. Cl- С. Br- d. I- O a. fluoride b. chloride O c. bromide O d. iodide
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- Which of the following is the strongest nucleophile? O a. CH3 O b. NH2 С. O C. HO O d. F .O e. NH3Which of the following compounds is the most reactive towards nucleophilic attack? a Ос Od Oe O b a. H b. C. d. NH2 e. ia CIWhich of the following is the STRONGEST nucleophile? -OH go- II III IV а. I b. II с. Ш d. IV
- In the following reaction which species acts as the nucleophile? OCH CH3 (H.C).NOCH CH CH,CH OH OCH,CH , OCH,CH, A. OCH,CH, (H,C),N B. C. CH,CH,OH D. (D)Rank the nucleophiles in each group in order of increasing nucleophilicity. а. "ОН, NH, Ha0 b. "OH, Br", F (polar aprotic solvent) c. H20, "OH, CHC0OWhich is a better nucleophile? a. Br or C in H20 b. Br or CI in DMSO c. CH3O or CH;OH in H20 d. CH30 or CH3OH in DMSO e. HO or NH2 in H20 f. HO or NH, in DMSO g. F or Br in H20 h. I or Br in DMSO
- 9. Rank the following nucleophiles, in a solution of DMF, in order of weakest to strongest. НО CI Strong Br Slow II II IVWhich is a better nucleophile? a. Br− or Cl− in H2O b. Br− or Cl− in DMSO c. CH3O− or CH3OH in H2O d. CH3O− or CH3OH in DMSO e. HO− or −NH2 in H2O f. HO− or −NH2 in DMSO g. I− or Br− in H2O h. I− or Br− in DMSOWhich of the following chemical species is considered as strongly basic nucleophile? а. Cyanide ion (CN-) b. Thiolate ions (RS-) С. Ammonia and amines d. Lithium aluminium hydride
- Identify the stronger nucleophile in each pair. a. NH3,−NH2 b. CH3NH2, CH3OH c. CH3CO2−, CH3CH2O−17. Which of the following is most likely to react as a nucleophile rather than a base? KOC(CH3)3 I A. I B. II C. III D. IV CH3COO- II DBU III DBN IVIdentify the stronger nucleophile in each pair. a.NH3, −NH2 b.CH3NH2, CH3OH c.CH3CO2−, CH3CH2O−