How does gold help to catalyze the reaction in the gold catalysis experiment? о а. It deprotonates the methanol, making methanol a better nucleophile. O b. It donates electron density to the alkyne, making the alkyne a better nucleophile. О с. It coordinates to the methanol, making methanol a better nucleophile. o d. It coordinates to the alkyne, making the alkyne a better electrophile.

How does gold help to catalyze the reaction in the gold catalysis experiment? о а. It deprotonates the methanol, making methanol a better nucleophile. O b. It donates electron density to the alkyne, making the alkyne a better nucleophile. О с. It coordinates to the methanol, making methanol a better nucleophile. o d. It coordinates to the alkyne, making the alkyne a better electrophile.

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter19: Eas: Electrophilic Aromatic Substitution

Section: Chapter Questions

Problem 3CTQ

See similar textbooks

Similar questions

1c. What is the nucleophile in the following reaction? .Br CH;CO0 Na LO OCCH3 NaBr ld. What is the electrophile in the following reaction? Br CH;COO Na L0OCCH3 NaBr +
e) sec-butyl bromide • Question 2: Identify the nucleophile and leaving group and draw the products of each reaction. a. b. Br + + OCH₂CH3 NaOH d. Br + N3 + NaCN
Identify the role/function of the indicated molecule in the reaction? 1. LIAIH, ether 2. Но NaN3 Br -NH2 a. Nucleophile b. Electrophile c. Base O d. Acid
10. Which species is acting as the nucleophile in this reaction? а. Н b. CE c. The carbocation cr d. The pi bond
4. Which of the following reactions is NOT a method of preparation of alkylhalide? A. addition of halogens to alkenes B. replacement of the -OH in alcohol by a halide C. dehydrohalogenation of hydrocarbon D. addition of hydrogen halide to alkene 5. In SN₂ reaction of alkylhalide(substrate) with NaOH(nucleophile), the rate of the reaction is tripled if the concentration of: A. Substrate and nucleophile are both doubled B. Nucleophile is decreased by 1/3 and substrate doubled C. Substrate is tripled and nucleophile doubled D. Nucleophile is tripled 6. Arrange the following alkylhalide in order of decreasing reactivity in an SN₁ reaction: I. CH3CH(Br)CH₂CH3 A. I>II>III>IV II. CH3CH(C1)CH₂CH3 III. CICH₂CH₂CH₂CH3 IV. (CH3)2C(Br)CHCH3 D. IV>II>I>III B. IV>III>II>I C. IV>I>II>III
Which 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 DMSO
Which of the following molecules is most nucleophilic? OA. NaOCH₂CH3 OB. CH3CH₂OH OC. NaOC6H5 OD. C₂H5OH 1 E.CH3COONa
Rank the species in each group in order of increasing nucleophilicity. a. CH3CH2S−CH3CH2O−, CH3CO2− in CH3OH b. CH3NH2, CH3SH, CHOH in acetone c.−OH, F−, Cl− in acetone d. HS−, F−, Cl− in CH3OH
Identify the missing reagent(s), reactant(s) or final product(s). Some transformations may require more than one step. Br ? Br D. E. in ? ? LIAIH
Which reagent can be used to convert ethanol (a poor nucleophile) into an alkoxide (a good nucleophile), which can then be used in an SN2 reaction to make a new O-C bond? Reagent Br Good HO, Nucleophile SN2 А. NaH В. HOC(CH3)3 · NaCl D.H20
Use the dropdown menu to indicate whether the rate of the reaction shown below will increase, decrease, or remain the same when the reaction conditions are changed to X or to Y or to Z (see below). NaN3 'N3 Br CH3CN X: Change the leaving group from Br to CI Y: Increase the concentration of haloalkane Z: Increase the concentration of NaN3 X: choose your answer.. ^ Y: choose your answer... V Z: choose your answer... choose your answer... Remain the same Nex Decrease Increase
What is the rate-determining step in an electrophilic substitution of benzene? Select one: O A. Loss of an H* ion from the arenium carbocation to reform the aromatic ring. O B. Attachment of the electrophile to the benzene ring. O C. O D. The step that generates the electrophile. regeneration of the reaction catalyst.