Determine the likely structure for a compound A (C6H10O),which is found to decolorize bromine in carbon tetrachloride.Its spectral data is as follows: 1H NMR IR Triplet,$\delta$1.0 singlet,$\delta$2.4 2200 cm-1 (sharp) Singlet,$\delta$ 1.4 singlet,$\delta$3.4 3300 cm-1 (sharp) Quartet,$\delta$ 1.6 3500 cm-1 (broad)

A) I B) II C) III D) IV E) V A) I B) II C) III D) IV E) V

Select the structure of a compound C6H14 with a base peak at m/z 43.

A) CH3CH2CH2CH2CH2CH3 B) (CH3CH2)2CHCH3 C) (CH3)3CCH2CH3 D) (CH3)2CHCH(CH3)2 E) None of these choices. A) CH3CH2CH2CH2CH2CH3 B) (CH3CH2)2CHCH3 C) (CH3)3CCH2CH3 D) (CH3)2CHCH(CH3)2 E) None of these choices.

The 1H NMR spectrum of which of the compounds below,all of formula C7H12O2,would consist of three singlets only?

A) I B) II C) III D) IV E) V A) I B) II C) III D) IV E) V

The 1H NMR spectrum of which of the compounds below,all of formula C7H12O2,would consist of a singlet,a doublet and a triplet only?

A) I B) II C) III D) IV E) V A) I B) II C) III D) IV E) V

Exam 9: Nuclear Magnetic Resonance and Mass Spectrometry

An unknown compound,V,has the formula C₈H₁₀O.Elucidate the structure of V by scrutinizing its IR,¹H NMR and ¹³C NMR spectra,shown below.

(Essay)

4.9/5

(87)

Question 121

Which one of the following best represents the predicted approximate chemical shift and coupling for the hydrogen(s)indicated with the arrow in the compound nicotine?

(Multiple Choice)

4.7/5

(79)

Question 122

The mass spectra of alkyl bromides and chlorides are characterized by an unusually intense ___.

(Multiple Choice)

4.9/5

(70)

Question 123

Which proton(s)of the compound below would appear as a triplet in the ¹H NMR spectrum?

(Multiple Choice)

4.8/5

(69)

Question 124

A compound with the molecular formula C₈H₉ClO gave the following ¹H NMR spectrum: triplet, $\delta$ 3.7 Triplet, $\delta$ 4.2 Multiplet, $\delta$ 7.1 There was no evidence of an -OH band in the IR spectrum.The most likely structure for the compound is: $A compound with the molecular formula C8H9ClO gave the following 1H NMR spectrum: triplet, \delta 3.7 Triplet, \delta 4.2 Multiplet, \delta 7.1 There was no evidence of an -OH band in the IR spectrum.The most likely structure for the compound is:$

(Multiple Choice)

4.9/5

(80)

Question 125

What is the molecular formula of this compound? m/z intensity 84 M⁺ $\bullet$ 10.00 85 0.56 86 0.04

(Multiple Choice)

4.7/5

(86)

Question 126

Determine the likely structure for a compound A (C₆H₁₀O),which is found to decolorize bromine in carbon tetrachloride.Its spectral data is as follows: ¹H NMR IR Triplet, $\delta$ 1.0 singlet, $\delta$ 2.4 2200 cm^-1 (sharp) Singlet, $\delta$ 1.4 singlet, $\delta$ 3.4 3300 cm^-1(sharp) Quartet, $\delta$ 1.6 3500 cm^-1(broad) $Determine the likely structure for a compound A (C6H10O),which is found to decolorize bromine in carbon tetrachloride.Its spectral data is as follows: 1H NMR IR Triplet, \delta 1.0 singlet, \delta 2.4 2200 cm-1 (sharp) Singlet, \delta 1.4 singlet, \delta 3.4 3300 cm-1 (sharp) Quartet, \delta 1.6 3500 cm-1 (broad)$

(Multiple Choice)

4.8/5

(79)

Question 127

Which proton(s)of the compound below would appear as a doublet in the ¹H NMR spectrum?

(Multiple Choice)

4.8/5

(79)

Question 128

Select the structure of a compound C₆H₁₄ with a base peak at m/z 43.

(Multiple Choice)

4.7/5

(74)

Question 129

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₄H₈O? Relative integration is shown.

(Multiple Choice)

4.8/5

(74)

Question 130

When measuring the integral for a particular peak in the NMR spectrum,we are not interested in the peak height as much as in the ___.

(Short Answer)

4.9/5

(77)

Question 131

The ¹H NMR spectrum of which of the compounds below,all of formula C₇H₁₂O₂,would consist of three singlets only?

(Multiple Choice)

4.8/5

(73)

Question 132

A mass spectrometer sorts ions on the basis of their ___.

(Short Answer)

4.9/5

(84)

Question 133

The ¹H NMR spectrum of which of the compounds below,all of formula C₇H₁₂O₂,would consist of a singlet,a doublet and a triplet only?

(Multiple Choice)

4.8/5

(90)

Question 134

The C₇ compound which gives 3 signals in the broadband proton-decoupled ¹³C spectrum could be:

(Multiple Choice)

4.7/5

(89)

Question 135

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₁₂H₁₇NO and a characteristic IR stretch near 1700 cm^-1 and a characteristic peak in the ¹³C-NMR at 170 ppm? Relative integration is shown.

(Multiple Choice)

4.9/5

(81)

Question 136

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₉H₁₄O? IR data shows no characteristic peak around 1700 cm^-1.The ¹³C-NMR chemical shifts (ppm): 108.4,50.9,31.6,23.5,2.0.Relative integration is known.

(Multiple Choice)

4.8/5

(70)

Question 137

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₅H₈O? The IR spectrum does show a characteristic stretch around 1700 cm^-1.Relative integration is shown.

(Multiple Choice)

4.9/5

(78)

Question 138

For the following compound how many different signals would you see in the proton NMR? (Assume that you can see them all.)

(Multiple Choice)

4.7/5

(71)

Question 139

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₆H₁₁N? In the IR spectrum you notice a stretch at about 2250 cm^-1.Relative integration is shown.

(Multiple Choice)

4.8/5

(60)

Question 140

Showing 121 - 140 of 158

Exam 9: Nuclear Magnetic Resonance and Mass Spectrometry

An unknown compound,V,has the formula C8H10O.Elucidate the structure of V by scrutinizing its IR,1H NMR and 13C NMR spectra,shown below.

Which one of the following best represents the predicted approximate chemical shift and coupling for the hydrogen(s)indicated with the arrow in the compound nicotine?

The mass spectra of alkyl bromides and chlorides are characterized by an unusually intense ___.

Which proton(s)of the compound below would appear as a triplet in the 1H NMR spectrum?

A compound with the molecular formula C8H9ClO gave the following 1H NMR spectrum: triplet, δ\deltaδ 3.7 Triplet, δ\deltaδ 4.2 Multiplet, δ\deltaδ 7.1 There was no evidence of an -OH band in the IR spectrum.The most likely structure for the compound is:

What is the molecular formula of this compound? m/z intensity 84 M+ ∙\bullet∙ 10.00 85 0.56 86 0.04

Which proton(s)of the compound below would appear as a doublet in the 1H NMR spectrum?

Select the structure of a compound C6H14 with a base peak at m/z 43.

What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C4H8O? Relative integration is shown.

When measuring the integral for a particular peak in the NMR spectrum,we are not interested in the peak height as much as in the ___.

The 1H NMR spectrum of which of the compounds below,all of formula C7H12O2,would consist of three singlets only?

A mass spectrometer sorts ions on the basis of their ___.

The 1H NMR spectrum of which of the compounds below,all of formula C7H12O2,would consist of a singlet,a doublet and a triplet only?

The C7 compound which gives 3 signals in the broadband proton-decoupled 13C spectrum could be:

What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C12H17NO and a characteristic IR stretch near 1700 cm-1 and a characteristic peak in the 13C-NMR at 170 ppm? Relative integration is shown.

What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C9H14O? IR data shows no characteristic peak around 1700 cm-1.The 13C-NMR chemical shifts (ppm): 108.4,50.9,31.6,23.5,2.0.Relative integration is known.

What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C5H8O? The IR spectrum does show a characteristic stretch around 1700 cm-1.Relative integration is shown.

For the following compound how many different signals would you see in the proton NMR? (Assume that you can see them all.)

What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C6H11N? In the IR spectrum you notice a stretch at about 2250 cm-1.Relative integration is shown.

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

An unknown compound,V,has the formula C₈H₁₀O.Elucidate the structure of V by scrutinizing its IR,¹H NMR and ¹³C NMR spectra,shown below.

Which proton(s)of the compound below would appear as a triplet in the ¹H NMR spectrum?

What is the molecular formula of this compound? m/z intensity 84 M⁺ $\bullet$ 10.00 85 0.56 86 0.04

Which proton(s)of the compound below would appear as a doublet in the ¹H NMR spectrum?

Select the structure of a compound C₆H₁₄ with a base peak at m/z 43.

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₄H₈O? Relative integration is shown.

The ¹H NMR spectrum of which of the compounds below,all of formula C₇H₁₂O₂,would consist of three singlets only?

The ¹H NMR spectrum of which of the compounds below,all of formula C₇H₁₂O₂,would consist of a singlet,a doublet and a triplet only?

The C₇ compound which gives 3 signals in the broadband proton-decoupled ¹³C spectrum could be:

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₁₂H₁₇NO and a characteristic IR stretch near 1700 cm^-1 and a characteristic peak in the ¹³C-NMR at 170 ppm? Relative integration is shown.

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₉H₁₄O? IR data shows no characteristic peak around 1700 cm^-1.The ¹³C-NMR chemical shifts (ppm): 108.4,50.9,31.6,23.5,2.0.Relative integration is known.

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₅H₈O? The IR spectrum does show a characteristic stretch around 1700 cm^-1.Relative integration is shown.

What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₆H₁₁N? In the IR spectrum you notice a stretch at about 2250 cm^-1.Relative integration is shown.