Give the splitting pattern for each proton in the 1H NMR spectrum.

A) a = triplet; b = doublet; c = doublet; d = multiplet; e = triplet B) a = doublet; b = triplet; c = doublet; d = multiplet; e = doublet C) a = triplet; b = quartet; c = triplet; d = multiplet; e = triplet D) a = singlet; b = doublet; c = singlet; d = multiplet; e = singlet E) a = triplet; b = quartet; c= triplet; d = multiplet; e = doublet A) a = triplet; b = doublet; c = doublet; d = multiplet; e = triplet B) a = doublet; b = triplet; c = doublet; d = multiplet; e = doublet C) a = triplet; b = quartet; c = triplet; d = multiplet; e = triplet D) a = singlet; b = doublet; c = singlet; d = multiplet; e = singlet E) a = triplet; b = quartet; c= triplet; d = multiplet; e = doublet

How many signals would you expect to see in the 1H NMR spectrum of the following compound?

A) 1 B) 2 C) 4 D) 5 E) 3 A) 1 B) 2 C) 4 D) 5 E) 3

Predict the integration for each proton in the 1H NMR spectrum.

A) a = 2H; b = 3H; c = 2H; d = 3H; e = 2H B) a = 2H; b = 3H; c = 2H; d = 5H; e = 2H C) a = 5H; b = 5H; c = 7H; d = 7H; e = 7H D) a = 3H; b = 2H; c = 2H; d = 2H; e = 3H E) a = 3H; b = 2H; c = 2H; d = 3H; e = 2H A) a = 2H; b = 3H; c = 2H; d = 3H; e = 2H B) a = 2H; b = 3H; c = 2H; d = 5H; e = 2H C) a = 5H; b = 5H; c = 7H; d = 7H; e = 7H D) a = 3H; b = 2H; c = 2H; d = 2H; e = 3H E) a = 3H; b = 2H; c = 2H; d = 3H; e = 2H

How many signals would you expect to see in the 1H NMR spectrum of the following compound?

A) 6 B) 3 C) 5 D) 4 E) 2 A) 6 B) 3 C) 5 D) 4 E) 2

Exam 15: Nmr Spectroscopy

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Deduce the identity of the following compound from the spectral data given. C₇H₁₀O₂: ¹H NMR, δ 1.16 (3H, singlet), 2.21 (2H, singlet); ¹³C NMR, δ 216.25 (singlet), 52.57 (singlet), 34.51 (triplet), 20.22 (quartet)

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Question 81

Deduce the identity of the following compound from the ¹H NMR data given. C₈H₁₀O: δ 3.4 (3H, singlet), 4.5 (2H, singlet), 7.2 (5H, singlet)

(Short Answer)

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Question 82

How many distinct carbon signals are expected in the proton-decoupled ¹³C NMR spectrum of the compound below?

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Question 83

Give the splitting pattern for each proton in the ¹H NMR spectrum.

(Multiple Choice)

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Question 84

Deduce the identity of the following compound from the spectral data given. C₄H₈O₂: ¹H NMR, δ 1.23 (3H, triplet), 2.00 (3H, singlet), 4.02 (2H, quartet); IR, 2980, 1740 cm-1

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Question 85

How many signals would you expect to see in the ¹H NMR spectrum of the following compound?

(Multiple Choice)

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Question 86

Provide the structure that is consistent with the data below. C₆H₁₀ IR (cm^-1): 2950, 2230 ¹H NMR (d): 2.0 (1H, septet), 1.8 (3H, s), 0.9 (6H, d) ¹³C NMR (d): 78 (s), 72 (s), 45 (d), 18 (q), 15 (q)

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Question 87

An unknown compound, C₉H₁₂, gave the following NMR spectrum: Triplet at 1.21 ppm (3H)Singlet at 2.30 ppm (3H)Quartet at 2.60 ppm (2H)Singlet at 7.04 ppm (4H) What is the structure of the compound?

(Multiple Choice)

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Question 88

Which of the following compounds gives the highest chemical shift value (farthest downfield)in the NMR spectrum?

(Multiple Choice)

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Question 89

Give the integration and splitting pattern for the indicated signals in the ¹H NMR spectrum.

(Multiple Choice)

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Question 90

Predict the number of signals expected, their splitting, and their relative area in the ¹H NMR spectrum of (CH₃)₃CCHO.

(Short Answer)

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Question 91

Predict the integration for each proton in the ¹H NMR spectrum.

(Multiple Choice)

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Question 92

Mark with an asterisk each carbon that would not produce a signal in the DEPT ¹³C NMR spectrum of the compound below.

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Question 93

Which of the following technique(s)can readily distinguish between: ?

(Multiple Choice)

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Question 94

Deduce the identity of the following compound from the spectral data given. C₉H₁₂ : ¹³C NMR, δ 21.3 (quartet), 127.2 (doublet), 138.0 (singlet)(ppm)

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Question 95

Which of the following compounds has a triplet at 9.8 in its ¹H NMR spectrum?

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Question 96

Deduce the identity of the following compound from the ¹H NMR spectral data given. C₉H₁₀O₂: δ 2.2 (3H, singlet), 5.0 (2H, singlet), 7.2 (5H, multilet)(ppm)

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Question 97

Give the structurre for the compound that has a formula of C₁₁H₁₆O and the following¹H NMR and ¹³C NMR spectra. Label the hydrogens and the carbons. ¹H NMR spectrum: 1.3 ppm, (d, 6H); 3.1 ppm (sept, 1H); 3.2 ppm (s, 3H); 4.6 ppm (s, 2H), 7.1 ppm (d, 2H), 7.1 ppm (d, 2H) ¹³C NMR spectrum: 24.4 ppm (CH₃); 31.7 ppm (CH); 53.5 ppm (CH₃); 77.9 ppm (CH₂); 126.2 ppm (CH); 127.3 ppm (CH); 134.4 ppm (C); and 147.8 ppm (C).

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Question 98

The chair form of cyclohexane has protons in two distinct environments, axial and equatorial. When the proton NMR of cyclohexane is run on a 100 MHz instrument at 23°C, only one signal for the compound is observed. Explain this apparent contradiction.

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Question 99

How many signals would you expect to see in the ¹H NMR spectrum of the following compound?

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Question 100

Showing 81 - 100 of 110

Exam 15: Nmr Spectroscopy

Deduce the identity of the following compound from the spectral data given. C7H10O2: 1H NMR, δ 1.16 (3H, singlet), 2.21 (2H, singlet); 13C NMR, δ 216.25 (singlet), 52.57 (singlet), 34.51 (triplet), 20.22 (quartet)

Deduce the identity of the following compound from the 1H NMR data given. C8H10O: δ 3.4 (3H, singlet), 4.5 (2H, singlet), 7.2 (5H, singlet)

How many distinct carbon signals are expected in the proton-decoupled 13C NMR spectrum of the compound below?

Give the splitting pattern for each proton in the 1H NMR spectrum.

Deduce the identity of the following compound from the spectral data given. C4H8O2: 1H NMR, δ 1.23 (3H, triplet), 2.00 (3H, singlet), 4.02 (2H, quartet); IR, 2980, 1740 cm-1

How many signals would you expect to see in the 1H NMR spectrum of the following compound?

Provide the structure that is consistent with the data below. C6H10 IR (cm-1): 2950, 2230 1H NMR (d): 2.0 (1H, septet), 1.8 (3H, s), 0.9 (6H, d) 13C NMR (d): 78 (s), 72 (s), 45 (d), 18 (q), 15 (q)

An unknown compound, C9H12, gave the following NMR spectrum: Triplet at 1.21 ppm (3H)Singlet at 2.30 ppm (3H)Quartet at 2.60 ppm (2H)Singlet at 7.04 ppm (4H) What is the structure of the compound?

Which of the following compounds gives the highest chemical shift value (farthest downfield)in the NMR spectrum?

Give the integration and splitting pattern for the indicated signals in the 1H NMR spectrum.

Predict the number of signals expected, their splitting, and their relative area in the 1H NMR spectrum of (CH3)3CCHO.

Predict the integration for each proton in the 1H NMR spectrum.

Mark with an asterisk each carbon that would not produce a signal in the DEPT 13C NMR spectrum of the compound below.

Which of the following technique(s)can readily distinguish between: ?

Deduce the identity of the following compound from the spectral data given. C9H12 : 13C NMR, δ 21.3 (quartet), 127.2 (doublet), 138.0 (singlet)(ppm)

Which of the following compounds has a triplet at 9.8 in its 1H NMR spectrum?

Deduce the identity of the following compound from the 1H NMR spectral data given. C9H10O2 : δ 2.2 (3H, singlet), 5.0 (2H, singlet), 7.2 (5H, multilet)(ppm)

The chair form of cyclohexane has protons in two distinct environments, axial and equatorial. When the proton NMR of cyclohexane is run on a 100 MHz instrument at 23°C, only one signal for the compound is observed. Explain this apparent contradiction.

How many signals would you expect to see in the 1H NMR spectrum of the following compound?

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds

Isomers: the Arrangement of Atoms in Space

Alkenes Thermodynamics and Kinetics

Reactions of Alkenes

Reactions of Alkynes Introduction to Multistep Synthesis

Electron Delocalization, Resonance, and Aromaticity More About Molecular Orbital Theory

Substitution Reactions of Alkyl Halides

Elimination Reactions of Alkyl Halides Competition Between Substitution and Elimination

Reactions of Alcohols, Ethers, Epoxides, and Sulfur-Containing Compounds

Organometallic Compounds

Reactions of Alkanes, Radicals

Mass Spectrometry, Infrared Spectroscopy, and Uvvis Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Alpha Carbon of Carbonyl Compounds

Reactions of Benzene and Substituted Benzenes

More About Amines Heterocylic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Catalysis

The Organic Mechanisms of the Coenzymes

The Chemistry of Metabolism

Nucleosides, Nucleotides, and Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

Deduce the identity of the following compound from the spectral data given. C₇H₁₀O₂: ¹H NMR, δ 1.16 (3H, singlet), 2.21 (2H, singlet); ¹³C NMR, δ 216.25 (singlet), 52.57 (singlet), 34.51 (triplet), 20.22 (quartet)

Deduce the identity of the following compound from the ¹H NMR data given. C₈H₁₀O: δ 3.4 (3H, singlet), 4.5 (2H, singlet), 7.2 (5H, singlet)

How many distinct carbon signals are expected in the proton-decoupled ¹³C NMR spectrum of the compound below?

Give the splitting pattern for each proton in the ¹H NMR spectrum.

Deduce the identity of the following compound from the spectral data given. C₄H₈O₂: ¹H NMR, δ 1.23 (3H, triplet), 2.00 (3H, singlet), 4.02 (2H, quartet); IR, 2980, 1740 cm-1

How many signals would you expect to see in the ¹H NMR spectrum of the following compound?

Provide the structure that is consistent with the data below. C₆H₁₀ IR (cm^-1): 2950, 2230 ¹H NMR (d): 2.0 (1H, septet), 1.8 (3H, s), 0.9 (6H, d) ¹³C NMR (d): 78 (s), 72 (s), 45 (d), 18 (q), 15 (q)

An unknown compound, C₉H₁₂, gave the following NMR spectrum: Triplet at 1.21 ppm (3H)Singlet at 2.30 ppm (3H)Quartet at 2.60 ppm (2H)Singlet at 7.04 ppm (4H) What is the structure of the compound?

Give the integration and splitting pattern for the indicated signals in the ¹H NMR spectrum.

Predict the number of signals expected, their splitting, and their relative area in the ¹H NMR spectrum of (CH₃)₃CCHO.

Predict the integration for each proton in the ¹H NMR spectrum.

Mark with an asterisk each carbon that would not produce a signal in the DEPT ¹³C NMR spectrum of the compound below.

Deduce the identity of the following compound from the spectral data given. C₉H₁₂ : ¹³C NMR, δ 21.3 (quartet), 127.2 (doublet), 138.0 (singlet)(ppm)

Which of the following compounds has a triplet at 9.8 in its ¹H NMR spectrum?

Deduce the identity of the following compound from the ¹H NMR spectral data given. C₉H₁₀O₂: δ 2.2 (3H, singlet), 5.0 (2H, singlet), 7.2 (5H, multilet)(ppm)

How many signals would you expect to see in the ¹H NMR spectrum of the following compound?