Exam 10: Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

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The amount of energy in electromagnetic radiation is related to the frequency and wavelength of the radiation. High energy radiation, like gamma rays, is of:

(Multiple Choice)

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Question 21

Match each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. -triple bond stretching vibrations.

(Multiple Choice)

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Question 22

Which of the following bonds undergoes stretching at the highest frequency?

(Multiple Choice)

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Question 23

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the highest energy?

(Multiple Choice)

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Question 24

Examining the infrared spectrum of a compound allows us to:

(Multiple Choice)

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Question 25

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s). (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. What peak represents M⁺?

(Essay)

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Question 26

The source of absorbance of light at a wavelength of 6600 nm would be:

(Multiple Choice)

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Question 27

Which of the following compounds gives an infrared spectrum with a peak at ˜1750 cm−¹, but no significant peaks at 3000−3500 cm−¹ or 1050−1250 cm−¹?

(Multiple Choice)

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Question 28

A 3.42 × 10−⁵ M solution of dibenzalacetone in ethanol produced an absorbance of 0.753 in a 1.00 cm cell. Based on this data, what is ε for this compound?

(Multiple Choice)

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Question 29

Which of the following compounds gives an infrared spectrum with peaks at 3000−3500 cm−¹ and ˜1750 cm−¹?

(Multiple Choice)

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Question 30

Circle any of the following compounds that would be a candidate to produce a UV absorption spectrum.

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Question 31

The amount of energy in infrared light corresponds to:

(Multiple Choice)

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Question 32

Match each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. -C=O, C=N, and C=C bond absorptions.

(Multiple Choice)

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Question 33

Which of the following compounds gives an infrared spectrum with no significant peaks at ˜3300 cm−¹ or 1600−1680 cm−¹?

(Multiple Choice)

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Question 34

Assume you are carrying out the conversion of 1-bromobutane to butan-1-ol. How could you use IR spectroscopy to determine when the reaction is complete?

(Essay)

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Question 35

What are the masses of the charged fragments produced by alpha cleavage of the following?

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Question 36

Select the most reasonable formula for the compounds with the following mass spectral data. -Refer to instructions. M⁺ at m/z = 101

(Multiple Choice)

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Question 37

Match each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. -C−C, C−O, C−N, and C−X single-bond vibrations.

(Multiple Choice)

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Question 38

Which of the following compounds gives an infrared spectrum with a peak at strong 1730 cm−¹?

(Multiple Choice)

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Question 39

Which of the following bonds gives rise to a strong absorbance near 1700 cm−¹ in the infrared spectrum?

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Question 40

Showing 21 - 40 of 43

Exam 10: Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

The amount of energy in electromagnetic radiation is related to the frequency and wavelength of the radiation. High energy radiation, like gamma rays, is of:

Match each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. -triple bond stretching vibrations.

Which of the following bonds undergoes stretching at the highest frequency?

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the highest energy?

Examining the infrared spectrum of a compound allows us to:

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s). (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. What peak represents M+?

The source of absorbance of light at a wavelength of 6600 nm would be:

Which of the following compounds gives an infrared spectrum with a peak at ˜1750 cm−1, but no significant peaks at 3000−3500 cm−1 or 1050−1250 cm−1?

A 3.42 × 10−5 M solution of dibenzalacetone in ethanol produced an absorbance of 0.753 in a 1.00 cm cell. Based on this data, what is ε for this compound?

Which of the following compounds gives an infrared spectrum with peaks at 3000−3500 cm−1 and ˜1750 cm−1?

Circle any of the following compounds that would be a candidate to produce a UV absorption spectrum.

The amount of energy in infrared light corresponds to:

Match each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. -C=O, C=N, and C=C bond absorptions.

Which of the following compounds gives an infrared spectrum with no significant peaks at ˜3300 cm−1 or 1600−1680 cm−1?

Assume you are carrying out the conversion of 1-bromobutane to butan-1-ol. How could you use IR spectroscopy to determine when the reaction is complete?

What are the masses of the charged fragments produced by alpha cleavage of the following?

Select the most reasonable formula for the compounds with the following mass spectral data. -Refer to instructions. M+ at m/z = 101

Match each of the following groups of bond-types to the region of the infrared spectrum in which their absorptions occur. -C−C, C−O, C−N, and C−X single-bond vibrations.

Which of the following compounds gives an infrared spectrum with a peak at strong 1730 cm−1?

Which of the following bonds gives rise to a strong absorbance near 1700 cm−1 in the infrared spectrum?

Structure and Bonding

Polar Covalent Bonds; Acids and Bases

Organic Compounds: Alkanes and Their Stereochemistry

Organic Compounds: Cycloalkanes and Their Stereochemistry

Stereochemistry at Tetrahedral Centers

An Overview of Organic Reactions

Alkenes and Alkynes

Reactions of Alkenes and Alkynes

Aromatic Compounds

Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, and Thiols; Ethers and Sulfides

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Nitriles

Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution and Condensation Reactions

Amines and Heterocycles

Biomolecules: Amino Acids, Peptides, and Proteins

Amino Acid Metabolism

Biomolecules: Carbohydrates

Carbohydrate Metabolism

Biomolecules: Lipids and Their Metabolism

Biomolecules: Nucleic Acids and Their Metabolism

Orbitals and Organic Chemistry: Pericyclic Reactionse

Synthetic Polymerse

Filters

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s). (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. What peak represents M⁺?

Which of the following compounds gives an infrared spectrum with a peak at ˜1750 cm−¹, but no significant peaks at 3000−3500 cm−¹ or 1050−1250 cm−¹?

A 3.42 × 10−⁵ M solution of dibenzalacetone in ethanol produced an absorbance of 0.753 in a 1.00 cm cell. Based on this data, what is ε for this compound?

Which of the following compounds gives an infrared spectrum with peaks at 3000−3500 cm−¹ and ˜1750 cm−¹?

Which of the following compounds gives an infrared spectrum with no significant peaks at ˜3300 cm−¹ or 1600−1680 cm−¹?

Select the most reasonable formula for the compounds with the following mass spectral data. -Refer to instructions. M⁺ at m/z = 101

Which of the following compounds gives an infrared spectrum with a peak at strong 1730 cm−¹?

Which of the following bonds gives rise to a strong absorbance near 1700 cm−¹ in the infrared spectrum?