Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3?

A) a triplet and a doublet B) a quartet and a sextet C) two singlets D) a triplet and a quartet A) a triplet and a doublet B) a quartet and a sextet C) two singlets D) a triplet and a quartet

Exam 13: Structure Determination

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

(Essay)

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Question 21

Which of the following compounds would produce the most downfield signal in a ¹³C NMR spectrum?

(Multiple Choice)

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Question 22

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

(Essay)

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Question 23

Instructions: Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). Refer to instructions. What is the splitting pattern for the hydrogens in 3-methylbutan-2-one labeled A, B, and C, respectively?

(Multiple Choice)

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Question 24

Consider the compound below: a) At what approximate positions might the compound show IR absorptions? b) How would this spectrum differ from that of cyclohexand?

(Essay)

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Question 25

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 26

Which feature in the ¹H NMR spectrum provides information about the number of neighboring protons of each proton in the compound?

(Multiple Choice)

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Question 27

What is the vertical axis of a mass spectrum?

(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 e for this compound?

(Multiple Choice)

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Question 29

Instructions: Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). Refer to instructions. What is the ratio of peak areas upon integration of the spectrum for A, B, and C respectively?

(Multiple Choice)

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Question 30

Instructions: Match a structure from the list below to the following IR spectra. A. B. C. D. E. F.

(Essay)

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Question 31

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 32

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

(Essay)

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Question 33

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

(Multiple Choice)

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Question 34

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 35

A compound with the molecular formula C₆H₄ClBr produces only two doublets in the ¹H NMR spectrum. a) Propose a structure for this compound. b) How many signals would be present in the $^{13}CNMR$ for this structure?

(Essay)

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Question 36

Which of the following combinations of peaks appears in the ¹H NMR spectrum of diethyl ether, CH₃CH₂OCH₂CH₃?

(Multiple Choice)

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Question 37

At what approximate positions might the compound below show IR absorptions?

(Essay)

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Question 38

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

(Essay)

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Question 39

Which of the following compounds would have the longest l_max in the UV region of the electromagnetic spectrum?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 64

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

Which of the following compounds would produce the most downfield signal in a ¹³C NMR spectrum?

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

Instructions: Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). Refer to instructions. What is the splitting pattern for the hydrogens in 3-methylbutan-2-one labeled A, B, and C, respectively?

Consider the compound below: a) At what approximate positions might the compound show IR absorptions? b) How would this spectrum differ from that of cyclohexand?

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?

Which feature in the ¹H NMR spectrum provides information about the number of neighboring protons of each proton in the compound?

What is the vertical axis of a mass spectrum?

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 e for this compound?

Instructions: Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). Refer to instructions. What is the ratio of peak areas upon integration of the spectrum for A, B, and C respectively?

Instructions: Match a structure from the list below to the following IR spectra. A. B. C. D. E. F.

Which of the following compounds gives an infrared spectrum with peaks at 3000-3500 cm^-1 and ~1750 cm^-1?

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

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

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:

A compound with the molecular formula C₆H₄ClBr produces only two doublets in the ¹H NMR spectrum. a) Propose a structure for this compound. b) How many signals would be present in the $^{13}CNMR$ for this structure?

Which of the following combinations of peaks appears in the ¹H NMR spectrum of diethyl ether, CH₃CH₂OCH₂CH₃?

At what approximate positions might the compound below show IR absorptions?

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

Which of the following compounds would have the longest l_max in the UV region of the electromagnetic spectrum?

Structure and Bonding:acids and Bases

Alkanes: The Nature of Organic Compounds

Alkenes and Alkynes: the Nature of Organic Reactions

Reactions of Alkenes and Alkynes

Aromatic Compounds

Sterechemistry at Tetrahedral Centers

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, Ethers, and Their Sulfur Analogs

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution Reactions and Condensation Reactions

Amines

Biomolecules: Carbohydrates

Biomolecules: Amino Acids, Peptides, and Proteins

Biomolecules: Lipids and Nucleic Acids

The Organic Chemistry of Metabolic Pathways

Filters

Exam 13: Structure Determination

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. Number of signals:

Which of the following compounds would produce the most downfield signal in a 13C NMR spectrum?

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

Instructions: Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). Refer to instructions. What is the splitting pattern for the hydrogens in 3-methylbutan-2-one labeled A, B, and C, respectively?

Consider the compound below: a) At what approximate positions might the compound show IR absorptions? b) How would this spectrum differ from that of cyclohexand?

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?

Which feature in the 1H NMR spectrum provides information about the number of neighboring protons of each proton in the compound?

What is the vertical axis of a mass spectrum?

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 e for this compound?

Instructions: Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). Refer to instructions. What is the ratio of peak areas upon integration of the spectrum for A, B, and C respectively?

Instructions: Match a structure from the list below to the following IR spectra. A. B. C. D. E. F.

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

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. Number of signals:

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

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:

A compound with the molecular formula C6H4ClBr produces only two doublets in the 1H NMR spectrum. a) Propose a structure for this compound. b) How many signals would be present in the 13CNMR^{13}CNMR13CNMR for this structure?

Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3?

At what approximate positions might the compound below show IR absorptions?

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. Number of signals:

Which of the following compounds would have the longest lmax in the UV region of the electromagnetic spectrum?

Structure and Bonding:acids and Bases

Alkanes: The Nature of Organic Compounds

Alkenes and Alkynes: the Nature of Organic Reactions

Reactions of Alkenes and Alkynes

Aromatic Compounds

Sterechemistry at Tetrahedral Centers

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, Ethers, and Their Sulfur Analogs

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution Reactions and Condensation Reactions

Amines

Biomolecules: Carbohydrates

Biomolecules: Amino Acids, Peptides, and Proteins

Biomolecules: Lipids and Nucleic Acids

The Organic Chemistry of Metabolic Pathways

Filters

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

Which of the following compounds would produce the most downfield signal in a ¹³C NMR spectrum?

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?

Which feature in the ¹H NMR spectrum provides information about the number of neighboring protons of each proton in the compound?

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 e for this compound?

Which of the following compounds gives an infrared spectrum with peaks at 3000-3500 cm^-1 and ~1750 cm^-1?

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

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

A compound with the molecular formula C₆H₄ClBr produces only two doublets in the ¹H NMR spectrum. a) Propose a structure for this compound. b) How many signals would be present in the $^{13}CNMR$ for this structure?

Which of the following combinations of peaks appears in the ¹H NMR spectrum of diethyl ether, CH₃CH₂OCH₂CH₃?

Instructions: For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. Number of signals:

Which of the following compounds would have the longest l_max in the UV region of the electromagnetic spectrum?