Question 1

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type.
-_______
CH3CH2OCH(CH3)

Accepted Answer

A)  4000 to 2500 cm-1
B)  2500 to 2000 cm-1
C)  2000 to 1500 cm-1
D)  below 1500 cm-1E) B) and C)
F) A) and B)

Question 2

MATCH each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. Place the letter of the region in the blank to the left of the bond-type.
-_____ triple bond stretching vibrations.

Accepted Answer

A)  4000 to 2500 cm-1
B)  2500 to 2000 cm-1
C)  2000 to 1500 cm-1
D)  below 1500 cm-1E) B) and D)
F) None of the above

Question 3

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm-1 (strong) , but does not have peaks 3200-3650 at 1630-1820 or cm-1?

Accepted Answer

A)  alcohol
B)  aldehyde or ketone
C)  ether
D)  esterE) A) and B)
F) None of the above

Question 4

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type.
-_______ -1 B) 2500 to 2000 cm-1 C) 2000 to 1500 cm-1 D) below 1500 cm-1" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  4000 to 2500 cm-1
B)  2500 to 2000 cm-1
C)  2000 to 1500 cm-1
D)  below 1500 cm-1E) None of the above
F) All of the above

Question 5

MATCH each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. Place the letter of the region in the blank to the left of the bond-type.
-_____ N-H, C-H, and O-H stretching and bending motions.

Accepted Answer

A)  4000 to 2500 cm-1
B)  2500 to 2000 cm-1
C)  2000 to 1500 cm-1
D)  below 1500 cm-1E) A) and D)
F) A) and C)

Question 6

Provide the structure of three compounds with the molecular formula C4H8O that give an absorption peak at 1600-1640 cm-1 in the infrared spectrum, but no significant peaks at 3000-3600 cm-1 or at 1650-1750 cm-1.

Accepted Answer

Any three ...

Question 7

Which of the following processes takes place upon absorption of infrared radiation?

Accepted Answer

A)  bond vibration
B)  electron excitation
C)  nuclear spin flip
D)  electron spin flipE) None of the above
F) C) and D)

Exam 12: Infrared Spectroscopy

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type. -_______ CH₃CH₂OCH(CH₃)

Correct Answer
verified

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm^-¹ (strong) , but does not have peaks 3200-3650 at 1630-1820 or cm^-¹?

Correct Answer
verified

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type. -_______

Correct Answer
verified

MATCH each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. Place the letter of the region in the blank to the left of the bond-type. -_____ triple bond stretching vibrations.

Correct Answer
verified

MATCH each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. Place the letter of the region in the blank to the left of the bond-type. -_____ N-H, C-H, and O-H stretching and bending motions.

Correct Answer
verified

Provide the structure of three compounds with the molecular formula C₄H₈O that give an absorption peak at 1600-1640 cm^-1 in the infrared spectrum, but no significant peaks at 3000-3600 cm^-1 or at 1650-1750 cm^-1.

Correct Answer
verified
Any three ...
View Answer

Which of the following processes takes place upon absorption of infrared radiation?

Correct Answer
verified

Exam 12: Infrared Spectroscopy

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type. -_______ CH3CH2OCH(CH3)

Correct AnswerverifiedShow Answer

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm-1 (strong) , but does not have peaks 3200-3650 at 1630-1820 or cm-1?

Correct AnswerverifiedShow Answer

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type. -_______

Correct AnswerverifiedShow Answer

MATCH each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. Place the letter of the region in the blank to the left of the bond-type. -_____ triple bond stretching vibrations.

Correct AnswerverifiedShow Answer

MATCH each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. Place the letter of the region in the blank to the left of the bond-type. -_____ N-H, C-H, and O-H stretching and bending motions.

Correct AnswerverifiedShow Answer

Provide the structure of three compounds with the molecular formula C4H8O that give an absorption peak at 1600-1640 cm-1 in the infrared spectrum, but no significant peaks at 3000-3600 cm-1 or at 1650-1750 cm-1.

Correct AnswerverifiedAny three ...View AnswerShow Answer

Which of the following processes takes place upon absorption of infrared radiation?

Correct AnswerverifiedShow Answer

MATCH each of the following molecules to the region of the infrared spectrum in which they may show a significant absorption. Place the letter of the region in the blank to the left of the bond-type. -_______ CH₃CH₂OCH(CH₃)

Correct Answer
verified

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm^-¹ (strong) , but does not have peaks 3200-3650 at 1630-1820 or cm^-¹?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Provide the structure of three compounds with the molecular formula C₄H₈O that give an absorption peak at 1600-1640 cm^-1 in the infrared spectrum, but no significant peaks at 3000-3600 cm^-1 or at 1650-1750 cm^-1.

Correct Answer
verified
Any three ...
View Answer

Correct Answer
verified