Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

12 Questions in Quiz 3 - Elementary Organic Chemistry II | CH 232, Quizzes of Organic Chemistry

Material Type: Quiz; Professor: Blackstock; Class: Elem Organic Chem II; Subject: CH-Chemistry; University: University of Alabama; Term: Summer 2009;

Typology: Quizzes

Pre 2010

Uploaded on 09/17/2009

koofers-user-i1f
koofers-user-i1f 🇺🇸

10 documents

1 / 2

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Quiz 3 (ch 18, 19) CH232 July 21, 2009 Blackstock
1. Many nucleophilic addition reactions of aldehydes and ketones are catalyzed by acid or base. Bases catalyze hydration by :
a. making the carbonyl group more electrophilic
b. shifting the equilibrium of the reaction
c. making the carbonyl group less electrophilic
d. converting the water to hydroxide ion, a much better nucleophile
2. The reaction of an aldehyde with hydrogen cyanide is an example of ________ reaction.
a. a nucleophilic substitution
b. an electrophilic addition
c. an electrophilic substitution
d. a nucleophilic addition
Choose the BEST r eagent for carrying out each of the following convers ions.
3.
A. LiAlH4, THF, then H3O+ B. NaBH4, ethanol
C. 1. DIBAH, toluene D. All of the above work well
2. H3O+
4.
A. 1. PhMgBr, ether B. 1. PhCH2MgBr, ether
2. H3O+ 2. H3O+
C. (C6H5)3P=CHC6H5, THF D. Li(C6H5)2Cu, ether
5. What would be a suitable solvent for the preparation of ethylmagnesium bromide from ethyl bromide and
magnesium?
A. CH3CO2CH2CH3 B. CH3CH2OH
C. CH3CO2H D. CH3OCH2CH2OCH3
6.
OCH3
O
H
O
O
pf2

Partial preview of the text

Download 12 Questions in Quiz 3 - Elementary Organic Chemistry II | CH 232 and more Quizzes Organic Chemistry in PDF only on Docsity!

Quiz 3 (ch 18, 19) CH232 July 21, 2009 Blackstock

1. Many nucleophilic addition reactions of aldehydes and ketones are catalyzed by acid or base. Bases catalyze hydration by: a. making the carbonyl group more electrophilic b. shifting the equilibrium of the reaction c. making the carbonyl group less electrophilic d. converting the water to hydroxide ion, a much better nucleophile 2. The reaction of an aldehyde with hydrogen cyanide is an example of ________ reaction. a. a nucleophilic substitution b. an electrophilic addition c. an electrophilic substitution d. a nucleophilic addition Choose the BEST reagent for carrying out each of the following conversions. 3. A. LiAlH 4 , THF, then H 3 O+^ B. NaBH 4 , ethanol C. 1. DIBAH, toluene D. All of the above work well 2. H 3 O+ 4. A. 1. PhMgBr, ether B. 1. PhCH 2 MgBr, ether 2. H 3 O+^ 2. H 3 O+ C. (C 6 H 5 ) 3 P=CHC 6 H 5 , THF D. Li(C 6 H 5 ) 2 Cu, ether

5. What would be a suitable solvent for the preparation of ethylmagnesium bromide from ethyl bromide and

magnesium?

A. CH 3 CO 2 CH 2 CH 3 B. CH 3 CH 2 OH

C. CH 3 CO 2 H D. CH 3 OCH 2 CH 2 OCH 3

OCH 3 O H O O