CHM 2210_NMR_S2013_Practice - CHM 2210 ORGANIC CHEMISTRY I...

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CHM 2210_NMR_S2013_Practice

View Notes - CHM 2210_NMR_S2013_Practice from SCIENCE 101 at Florida A&M University.

1 .   Which of the following are considered to be bending ( in - plane ) vibrations ?
A. scissoring and wagging
B. scissoring and twisting
C. rocking and wagging
D. rocking and twisting
E. scissoring and rocking
Answer:  A )   scissoring and rocking
2 .   Which of the following solvents is best used in infrared spectroscopy ?
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3 .   Which of the following is not a common bending vibration of a CH 2 group ?
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4 .   While cleaning the organic stockroom , a student found a bottle of ethanol labeled " Denatured with Benzene . " He decided to determine the concentration of benzene in the ethanol by acquiring the UV spectrum of the liquid in a 2.0 cm cell . The spectrum exhibited an absorption band at 260 nm which was attributable to benzene , and the absorbance of this band was 0.69 . In a reference source , the student found that the molar absorptivity of this benzene band in ethanol was 230 M - 1 cm - 1 . Show how the student calculated the concentration of the benzene in the ethanol .
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5 .   Which molecule below has a significant band in the IR at 2220 cm - 1 ( medium ) ?
A. CH 3 CH 2 CH 2 OH
B. CH 3 C≡CCH 2 CH 3
C. CH 3 CH 2 CH ( NH 2 ) CH 3
D. ( CH 3 ) 3 N
E. CH 3 CO 2 CH 2 CH 3
Answer:  B )   CH 3 C≡CCH 2 CH 3
6 .   Which of the following statements best explains the information we can gain from infrared spectroscopy ?
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11 .   Which of the following species has a characteristic broad absorption at 3200-3500 2 cm -1 in its IR spectrum ?
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7 .   Which compound would be expected to show intense IR absorption at 1715 cm 1 ?
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8 .   Which of the following wavenumbers corresponds to the bond shown below ?
A. C  C
A. 1650 cm - 1
B. 2100 cm - 1
C. 1100 cm - 1
D. 3300 cm - 1
E. 2850 cm - 1
9 .   Which of the following carbonyl groups exhibits the highest wavenumber in infrared spectroscopy ?
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10 .   Which compound would be expected to show intense IR absorption at 2250 cm 1 ?
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Chapter 13 / Exercise 13-3
Organic Chemistry
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CHM 2210 ORGANIC CHEMISTRY I1.Which of the following are considered to be bending (in-plane) vibrations?A.scissoring and waggingB.scissoring and twistingC.rocking and waggingD.rocking and twistingE.scissoring and rocking
2.Which of the following solvents is best used in infrared spectroscopy?
3.Which of the following is not a common bending vibration of a CH2group?
4.While cleaning the organic stockroom, a student found a bottle of ethanol labeled "Denatured with Benzene." He decided to determine the concentration of benzene in the ethanol by acquiring the UV spectrum of the liquid in a 2.0 cm cell. The spectrum exhibited an absorption band at 260 nm which was attributable to benzene, and the absorbance of this band was 0.69. In a reference source, the student found that the molar absorptivity of this benzene band in ethanol was 230 M-1cm-1. Show how the student calculated the concentration of the benzene in the ethanol.
5.Which molecule below has a significant band in the IR at 2220 cm-1(medium)?A.CH3CH2CH2OHB.CH3C≡CCH2CH3C.CH3CH2CH(NH2)CH3D.(CH3)3NE.CH3CO2CH2CH3
6.Which of the following statements best explains the information we can gain from infrared spectroscopy?
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Organic Chemistry
The document you are viewing contains questions related to this textbook.
Chapter 13 / Exercise 13-3
Organic Chemistry
McMurry
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