23. Which conditions favor an efficient (fast, high yield) Sn2 reaction between an appropriate alkyl halide and a nucleophile with a charge? A. high concentration of a strong nucleophile, polar protic solvent B. high concentration of a weak nucleophile, nonpolar solvent C. low concentration of a strong nucleophile, polar aprotic solvent D. low concentration of a weak nucleophile, nonpolar solvent E. high concentration of a strong nucleophile, polar aprotic solvent 24. Which of the following statements about an SN1 reaction is true? A. the reaction occurs in one-step B. there is no effect on reaction rate by nucleophile C. primary alkyl halides react faster than secondary alkyl halides D. the reaction proceeds with inversion of stereochemistry E. the reaction is favored by aprotic solvents 25. Consider the following alkyl bromides and identify the most reactive and the least reactive compound in an SN1 reaction. Br Br Br CH,Br A B D to

23. Which conditions favor an efficient (fast, high yield) Sn2 reaction between an appropriate alkyl halide and a nucleophile with a charge? A. high concentration of a strong nucleophile, polar protic solvent B. high concentration of a weak nucleophile, nonpolar solvent C. low concentration of a strong nucleophile, polar aprotic solvent D. low concentration of a weak nucleophile, nonpolar solvent E. high concentration of a strong nucleophile, polar aprotic solvent 24. Which of the following statements about an SN1 reaction is true? A. the reaction occurs in one-step B. there is no effect on reaction rate by nucleophile C. primary alkyl halides react faster than secondary alkyl halides D. the reaction proceeds with inversion of stereochemistry E. the reaction is favored by aprotic solvents 25. Consider the following alkyl bromides and identify the most reactive and the least reactive compound in an SN1 reaction. Br Br Br CH,Br A B D to

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 31CTQ

See similar textbooks

Similar questions

Rank the nucleophiles in each group in order of increasing nucleophilicity.a. -OH, -NH2, H2Ob. -OH, Br-, F- (polar aprotic solvent)c. H2O, -OH, CH3CO2-
Identify the stronger nucleophile in each pair of anions. a.Br− or Cl− in a polar protic solvent b.HO− or Cl− in a polar aprotic solvent c.HS− or F− in a polar protic solvent
Identify the stronger nucleophile in each pair. a.NH3, −NH2 b.CH3NH2, CH3OH c.CH3CO2−, CH3CH2O−
Identify the stronger nucleophile in each pair. a. NH3,−NH2 b. CH3NH2, CH3OH c. CH3CO2−, CH3CH2O−
The reaction will proceed with mechanism because the secondary alkyl halide react with nucleophile. + NaOCH3 Br CH3 O a. SN2, strong O b. SN1, strong O c. SN1, weak O d. SN2, weak
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, CHC0O
Which member of each pair is a better nucleophile in methanol?
10. Which species is acting as the nucleophile in this reaction? а. Н b. CE c. The carbocation cr d. The pi bond
a. HO b. NH 33. Which is a better nucleophile? a. H₂O or HO c. H₂S b. NH3 or NH₂ C. CH, CO in a better leaving group. or CH3CH₂O d. -0 or -0
Which 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
Under all conditions of epoxide ring-opening, the rate-determining step is always: Select one: A. Removal of H bonded to epoxide carbon. B. Attack of the nucleophile on epoxide carbon with ring-opening. C. protonation of the epoxide oxygen. D. Bonding of electrophile to epoxide oxygen
What mechanism is followed by Reaction 1 and 2? Possible Ans: Electrophilic addition, Electrophilic substitution, Radical substitution, Rearrangement What starting material is needed for reaction 1? a. Benzene b. Pent-2-ene c. Pent-2-yne d. Pentane