Match each type of data that a proton nuclear magnetic resonance ( 1 H NMR) spec

Question

Match each type of data that a proton nuclear magnetic resonance (1H NMR) spectrum provides to what it can tell.

1. The position of peaks (signal) along the horizontal is called the chemical shift, delta (), shielding, or up or down field.

2. The multiple peaks at each horizontal position is called splitting, coupling, or multiplicity. The peaks can be classified as singlet, doublet, triplet, quartet, quintet, sextet, heptet, octete, nonete, etc. The multiplets are suppressed in 13C NMR.

3. The area underneath each signal is called the integration. It is usually given as a series of increasing curves that flatten between peaks. It is not as useful for 13C NMR.

Answer choices:
A) the type of functional group
B) the number of hydrogens of each type
C) the number of vicinal hydrogen neighbors plus one

Explanation / Answer

1. The position of peaks (signal) along the horizontal is called the chemical shift, delta (), shielding, or up or down field.

A) the type of functional group

2. The multiple peaks at each horizontal position is called splitting, coupling, or multiplicity. The peaks can be classified as singlet, doublet, triplet, quartet, quintet, sextet, heptet, octete, nonete, etc. The multiplets are suppressed in 13C NMR.

C) the number of vicinal hydrogen neighbors plus one

3. The area underneath each signal is called the integration. It is usually given as a series of increasing curves that flatten between peaks. It is not as useful for 13C NMR.

B) the number of hydrogens of each type

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