Organic Chem 2 Quiz 1

Topics: Proton, Nuclear magnetic resonance, Proton NMR Pages: 6 (285 words) Published: January 24, 2015
Study Guide: Exam 1
1.How many different kinds of protons are present in each of the following compounds?    
 
A.a: 4; b: 4; c: 4
B.a: 4; b: 4; c: 5
C.a: 3; b: 3; c: 5
D.a: 3; b: 4; c: 5
E.a: 4; b: 3; c: 5
 
2.Which of the labeled hydrogens absorbs furthest upfield in the NMR?    
 
A.Ha
B.Hb
C.Hc
D.Hd
E.He
 
3.Which of the following compounds does not give a singlet in its NMR spectrum?

   
 
A.A
B.B
C.C
 
4.Which of the circled protons in the molecules below would absorb furthest downfield in the NMR?    
 
A.A
B.B
C.C
D.D
E.E
 
5.Which of the labeled protons would absorb furthest downfield in an NMR spectrum?    
 
A.A
B.B
C.C
D.D
E.E
 
6.Which of the indicated protons would absorb furthest downfield in an NMR spectrum?

   
 
A.A
B.B
C.C
 
7.Which compound does not give four sets of absorptions in its NMR spectrum (i.e., which compound does not have four kinds of hydrogens)?    
 
A.A
B.B
C.C
 
8.Compound X has a molecular formula C8H10, and gives the 1H NMR below. What is the structure of X?    
 
A.A
B.B
C.C
D.D
 
9.How many different kinds of protons are present in each of the following compounds?    
 
A.a: 5; b: 6
B.a: 5; b: 5
C.a: 4; b: 6
D.a: 4; b: 5
E.a: 3; b: 6
 
10.Into how many peaks will the circled proton be split?
   
 
A.5
B.6
C.7
D.8
 
 
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