1.) Infrared spectroscopy relies on what phenomenon? A.) electronic transitions B.) molecular rotations C.) nuclear alignments D.) molecular stretching and bending E.) conformational interconversion
14.) The IR spectrum of which type of compound generally exhibits evidence of hydrogen bonding? A.) Aldehyde B.) Carboxylic Acid C) Alkene D.) Ester E.) Ketone
16.) An anticitpated IR absorption band may not be observed because... A.) it occurs outside the range of the instrument used. B.) no change occurs in the dipole moment during the vibraton. C.) the absorption band is eclipsed by another. D.) the intensity is so weak that it cannot be differentiated from instrument noise. E.) all of these choicies
18.) The IR spectrum of which type of compound will not show evidence of hydrogen bonding? A.) Aldehyde B.) Alcohol C.) Carboxylic Acid D.)Phenol E.) Primamary amine
1.) Infrared spectroscopy relies on what phenomenon? A.) electronic transitions B.) molecular rotations C.) nuclear alignments D.) molecular stretching and bending E.) conformational interconversion
14.) The IR spectrum of which type of compound generally exhibits evidence of hydrogen bonding? A.) Aldehyde B.) Carboxylic Acid C) Alkene D.) Ester E.) Ketone
16.) An anticitpated IR absorption band may not be observed because... A.) it occurs outside the range of the instrument used. B.) no change occurs in the dipole moment during the vibraton. C.) the absorption band is eclipsed by another. D.) the intensity is so weak that it cannot be differentiated from instrument noise. E.) all of these choicies
18.) The IR spectrum of which type of compound will not show evidence of hydrogen bonding? A.) Aldehyde B.) Alcohol C.) Carboxylic Acid D.)Phenol E.) Primamary amine
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Related questions
1) The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A hydrocarbon exhibits no bands above 3000 but gives weak absorption at 2200 cm-1.
Relative absorption intensity: (s)=strong, (m)=medium, (w)=weak.
What functional class(es) does the compound belong to?
List only classes for which evidence is given here. Attach no significance to evidence not cited explicitly.
Do not over-interpret exact absorption band positions. None of your inferences should depend on small differences like 10 to 20 cm-1.
The functional class(es) of this compound is(are).(Enter letters from the table below, in any order, with no spaces or commas.)
| a. alkane (List only if no other functional class applies.) | ||||||||||||||||||||||||||
| b. alkene | h. amine | |||||||||||||||||||||||||
| c. terminal alkyne | i. aldehyde or ketone | |||||||||||||||||||||||||
| d. internal alkyne | j. carboxylic acid | |||||||||||||||||||||||||
| e. arene | k. ester | |||||||||||||||||||||||||
| f. alcohol | l. nitrile | |||||||||||||||||||||||||
| g. ether 2) The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A compound containing C, H, and O exhibits strong, broad absorption band at 3430 cm-1, a sharp band at 3300, and a band at 2200 cm-1 (m).
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