Each of the following given compounds is to be named. Concept introduction: The given compounds are carboxylic acids. Carboxylic acids are named according to the IUPAC nomenclature . Generally they are named based on the number of carbons in the longest continuous chain, including the carboxyl group ( − COOH ) . The carboxylic acids always end in − oic acid. To determine: The name of the given compound.

Question

Done 11:14 ⚫ worksheets.beyondlabz.com 5 (a). Using the peak information you listed in the tables for both structures, assign each peak to that portion of the structure that produces the peak in the NMR spectrum. Draw this diagram on your own sheet of paper and attach the sketch of your drawing to this question. Question 6 5 (b). Using the peak information you listed in the tables for both structures, assign each peak to that portion of the structure that produces the peak in the NMR spectrum. Draw this diagram on your own sheet of paper and attach the sketch of your drawing to this question. Question 7 6. Are there any differences between the spectra you obtained in Beyond Labz and the predicted spectra? If so, what were the differences? <

Answer 1

Question

Chapter 22, Problem 57E

(a)

Interpretation Introduction

Interpretation: Each of the following given compounds is to be named.

Concept introduction: The given compounds are carboxylic acids. Carboxylic acids are named according to the IUPAC nomenclature. Generally they are named based on the number of carbons in the longest continuous chain, including the carboxyl group (−COOH) . The carboxylic acids always end in −oic acid.

To determine: The name of the given compound.

(b)

Interpretation Introduction

Interpretation: Each of the following given compounds is to be named.

Concept introduction: The given compounds are carboxylic acids. Carboxylic acids are named according to the IUPAC nomenclature. Generally they are named based on the number of carbons in the longest continuous chain, including the carboxyl group (−COOH) . The carboxylic acids always end in −oic acid.

To determine: The name of the given compound.

(c)

Interpretation Introduction

Interpretation: Each of the following given compounds is to be named.

Concept introduction: The given compounds are carboxylic acids. Carboxylic acids are named according to the IUPAC nomenclature. Generally they are named based on the number of carbons in the longest continuous chain, including the carboxyl group (−COOH) . The carboxylic acids always end in −oic acid.

To determine: The name of the given compound.

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Done 11:14 ⚫ worksheets.beyondlabz.com 5 (a). Using the peak information you listed in the tables for both structures, assign each peak to that portion of the structure that produces the peak in the NMR spectrum. Draw this diagram on your own sheet of paper and attach the sketch of your drawing to this question. Question 6 5 (b). Using the peak information you listed in the tables for both structures, assign each peak to that portion of the structure that produces the peak in the NMR spectrum. Draw this diagram on your own sheet of paper and attach the sketch of your drawing to this question. Question 7 6. Are there any differences between the spectra you obtained in Beyond Labz and the predicted spectra? If so, what were the differences? <

2. Predict the NMR spectra for each of these two compounds by listing, in the NMR tables below, the chemical shift, the splitting, and the number of hydrogens associated with each predicted peak. Sort the peaks from largest chemical shift to lowest. **Not all slots must be filled** Peak Chemical Shift (d) 5.7 1 Multiplicity multiplate .......... 5.04 double of doublet 2 4.98 double of doublet 3 4.05 doublet of quartet 4 5 LO 3.80 quartet 1.3 doublet 6 Peak Chemical Shift (d) Multiplicity

Interpreting NMR spectra is a skill that often requires some amount of practice, which, in turn, necessitates access to a collection of NMR spectra. Beyond Labz Organic Synthesis and Organic Qualitative Analysis have spectral libraries containing over 700 1H NMR spectra. In this assignment, you will take advantage of this by first predicting the NMR spectra for two closely related compounds and then checking your predictions by looking up the actual spectra in the spectra library. After completing this assignment, you may wish to select other compounds for additional practice. 1. Write the IUPAC names for the following two structures: Question 2 Question 3 2. Predict the NMR spectra for each of these two compounds by listing, in the NMR tables below, the chemical shift, the splitting, and the number of hydrogens associated with each predicted peak. Sort the peaks from largest chemical shift to lowest. **Not all slots must be filled**