Final - Which of the following is not a bending vibrational...

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Unformatted text preview: Which of the following is not a bending vibrational mode in infrared spectroscopy? a. Rock b. Wag c. Twist d. Shake e. Scissor Considering the carbonyl C=O stretch, which of the following sets is in the correct order a. [penta-2-one], [pent-3-en-2-one], [acetaphenone], [p-dimethyl- amino acetaphenone] b. pent-3-en-2-one, penta-2-one, acetaphenone, p-dimethyl-amino acetaphenone c. acetaphenone, p-dimethyl-amino acetaphenone, penta-2-one, pent-3-en-2-one, d. penta-2-one, pent-3-en-2-one, p-dimethyl-amino acetaphenone , acetaphenone, e. p-dimethyl-amino acetaphenone, penta-2-one, pent-3-en-2-one, acetaphenone, The 2950 cm-1 signal observed for CO 2 in an IR is the result of: a. A symmetric stretch b. An asymmetric strecth c. Wagging d. Rocking e. Shacking Which of the following compounds would show the highest stretching frequency. a. HI b. HBr c. HCl d. HF e. HH Considering the carbonyl C=O stretch, which of the following sets is in the correct order a. Aldehyde, Ester, Carboxylic Acid, Ketone b. Ketone, Aldehyde, Ester, Carboxylic Acid c. Carboxylic Acid, Ketone, Aldehyde, Ester d. Ester, Carboxylic Acid, Ketone, Aldehyde e. Acid chloride, Ester, Aldehyde, Amide Which of the following compounds would be expected to show the weakest C%C stretch a. ethyne b. but-1-yne c. cyclo-octyne d. hex-2-yne e. hept-3-yne An intramolecular H-Bonded alcohol and amines will display characteristic broad peak found in which IR region? a. 3400-3100 cm-1 b. 3100-2900 cm-1 c. 2900-2500 cm-1 d. 2500-2000 cm-1 e. intramolecular H-bonding leads to sharp peaks If you wished to observe H-bonding concentration effects for a sample you would take two IRs using what technique(s)? a. Thin film b. KBr Pellet c. Solution Cell d. Nujol mull e. a then c The peak at 3400 cm-1 observed sometimes for cyclohexanone is the result of a. carbonyl b. the hydrate of the carbonyl c. an overtone d. destructive interference e. a and c The Following spectra best corresponds to what molecule a. cyclobutanol b. 2-butanone c. ethyl-vinyl ether d. 2-methyl-2-propen-1-ol e.e....
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Final - Which of the following is not a bending vibrational...

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