NMR Integration: Videos & Practice Problems

Provide the integration for the ¹H NMR signals expected for the hydrogens at the indicated carbons in the given compound. (Hint: Observe if there is symmetry in the structure.)

Give the integration for the ¹H NMR signals associated with the hydrogens at the indicated carbons in the given compound. (Hint: Observe if there is symmetry in the structure.)

Give the integration for the ¹H NMR signals expected for the hydrogens at the indicated carbons in the given compound. (Hint: Observe if there is symmetry in the structure.)

Give the predicted number of signals and the relative ratio of signal integrations for the molecule depicted below.

Structure identification becomes more efficient when one can identify the patterns of integration and multiplicity for common functional groups. For the indicated alkyl group in the following molecule, draw the expected integration and multiplicity patterns. (Do not worry about the chemical shifts.)

Structure identification becomes more efficient when one can identify the patterns of integration and multiplicity for common functional groups. For the indicated alkyl group in the following molecule, depict the expected integration and multiplicity patterns in the ¹H NMR spectrum. (Do not worry about the chemical shifts.)

Explain how signal integration of the ¹H NMR spectra will help identify the two compounds.
i) 1-bromoethane
ii) 1,1,2-tribromoethane

Fill out the values in the ¹H NMR table given below for the indicated hydrogens in the following compound.

Fill out the ¹H NMR data in the following table for the molecule given below.

Fill out the following ¹H NMR table for the indicated hydrogens in the molecule given below.

Draw the expected ¹H NMR signal for the indicated hydrogen. Show the integration and chemical shift for it.

Produce a table of chemical shifts, integrations, and multiplicities of each ¹H NMR peak expected from the labeled protons of the following compound.

What are the chemically nonequivalent proton ratios in the compound if the integration curve steps from left to right across the spectrum are 61, 122, 61, and 366 mm? Which of the following compounds would exhibit this sequence of integrals in a ¹H NMR spectrum?

i.  ii.  

iii.  iv.

What does NMR integration help determine in a molecule?

In NMR, what does the integration of a peak represent?

If the NMR integration ratio for a molecule is 2:3:1, what is the relative number of protons corresponding to each peak?

Given an integration ratio of 3:2:1, what could be the total number of protons if these represent actual counts?

When arranging an NMR spectrum, which of the following types of protons would appear most downfield?

Which type of proton is likely to be more downfield in an NMR spectrum?

Using the n+1 rule, how many peaks would you expect for a proton with two neighboring protons?