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TASK 10 – Using 1H and 13C NMR together to identify compounds. The 1H and 13C NMR spectra of C5H9OCl are shown. Deduce the structure of the compound and then explain each signal. The 1H and 13C NMR spectra of C5H10O2 are shown.
Chemistry 233 Chapter 13: NMR Spectroscopy Problem Set. 1) For each compound below, identify each chemically distinct type of hydrogen. Specify the number of 1H NMR signals you would expect to see. 3) Consider the indicated protons in each of the three compounds below.
Chapter 13: NMR Spectroscopy Problem Set 1) For each compound below, identify each chemically distinct type of hydrogen. Specify the number of 1H NMR signals you would expect to see. 2) Which of the indicated protons in each pair shows up farther downfield? Tips: For H-C-Z, H moves further downfield as Z becomes more electronegative
Chem 124 PAL Worksheet Proton NMR and combined practice problems Page 1 Write out the answers on separate sheets of paper. 1. 1How many signals will there be in the H NMR spectrum of each of these compounds? 2. Propose a structure that is consistent with each set of data. a. C 4 H 10 O 1H NMR spectrum singlet 1.28 (9H)
NMR (C) Complete the table about the NMR spectra of the compounds shown. The 1H NMR spectrum of a compound with the molecular formula C8H16O is shown. Deduce the structure of the compound.
Associate each of the following IR spectra with one of the following compounds and justify your answer. Propanoic acid: look for a carbonyl stretch and a broad OH stretch. 2-Pentanol: look for an OH peak (broad). No carbonyl peak, no sp2 CH’s. Benzyl alcohol; Look for an OH peak and sp2 CH’s. No carbonyl peak.
In the following NMR practice problems, we will go over the best strategies you can use for identifying the structure of unknown compounds. As a Chemistry Steps Prime member, you will also get access to the Spectroscopy Summary Sheets in addition to these over 100 min videos of solving NMR problems.
