NMR (1H)

NMR spectroscopy

Multiple Select

Which can be used as a solvent in NMR spectroscopy?

• Water

• Ethanol

• Tetrachloromethane

• Deuterated trichloromethane

Multiple Choice

What is the chemical used as the reference for NMR spectroscopy?

• Water

• Methane

• Tetramethylsilane

• 2,4-DNPH

Multiple Choice

what is the benefit of the reference chemical being inert?

• Does not react with chemical being tested.

• Easy to separate from chemical being tested.

• Peak is unlikely to be in the same region as any from the chemical being tested.

• Reference chemical produces a single clear peak

Multiple Choice

what is the benefit of the reference chemical being volatile?

• Easy to separate from chemical being tested.

• Peak is unlikely to be in the same region as any from the chemical being tested.

• Reference chemical produces a single clear peak

• Does not react with chemical being tested.

Multiple Choice

what is the benefit of the reference chemical being non-polar?

• Peak is unlikely to be in the same region as any from the chemical being tested.

• Easy to separate from chemical being tested.

• Reference chemical produces a single clear peak

• Does not react with chemical being tested.

Multiple Choice

what is the benefit of the reference chemical having 12 hydrogens in 1 environment?

• Reference chemical produces a single clear peak

• Easy to separate from chemical being tested.

• Peak is unlikely to be in the same region as any from the chemical being tested.

• Does not react with chemical being tested.

Multiple Choice

What do the number of peaks in an NMR spectra tell you?

• The number of environments

• The proportion of atoms in an environment

• How deshielded atoms are in the environment

• The number of hydrogens in the next environment

Multiple Choice

What does the height of the peaks in a 1H NMR spectra tell yo?

• The proportion of atoms in an environment

• The number of environments

• How deshielded atoms are in the environment

• The number of hydrogens in the next environment

Multiple Choice

What does the chemical shift of a peak in an NMR spectra tell you?

• How deshielded atoms are in the environment

• The number of environments

• The proportion of atoms in an environment

• The number of hydrogens in the next environment

Multiple Choice

What does the splitting pattern in a 1H NMR spectra tell you?

• The number of hydrogens in the next environment

• The number of environments

• The proportion of atoms in an environment

• How deshielded atoms are in the environment

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Integration 2:3:3

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Deduce the structure

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Integration 3:2:3

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Deduce the structure

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Integration 3:2:3

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Deduce the structure

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Integration 3:2:3

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Deduce the structure

How many peaks would you get for the hydrogens in the molecule CH₂ClCH₂Br and how would they be split?

How many peaks would you get for the hydrogens in the molecule CH₂ClCH₂Cl, and how would they be split?