Virtual chemlab organic synthesis and qualitative analysis

Lab-2

VCL 6-1: Interpreting IR Spectra

By: Michele Hopkins

Ocean County Community College

Chemistry 283

Virtual Chemistry Lab-Organic

01/22/12015

Table of contents

Title Page……………………………………. Page 1

Table of Contents……………………..……Page 2

Introduction………………………………....Page 3

IUPAC names……………………………....Page 3

Experimental Details …………………..Page 3-4

IR Tables/Results…………… …………..Page 3-4

IR Graphs……………………………………Page 5-6

Conclusion and Summary ………….Page 7

References…………………………………Page 8

VCL 6-1: Interpreting IR Spectra

Interpreting IR spectra is a skill that often requires some amount of practice, which, in turn, necessitates access to a collection of IR spectra. Virtual ChemLab has a spectra library containing more than 700 IR spectra. In this assignment, you will take advantage of this by interpreting the IR spectra of four similar compounds with different functional groups. After completing this assignment, you may wish to select

other compounds for additional practice.

1. Write the IUPAC names for the following four structures:

http://upload.wikimedia.org/wikipedia/commons/d/d7/Benzyl_chloride_structure.png

___Benzyl Chloride_____________________________________________________

http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Benzaldehyde.svg/630px-Benzaldehyde.svg.png

____Benzaldehyde________________________________________________

http://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Alkohol_benzylowy.svg/150px-Alkohol_benzylowy.svg.png

http://www.pharmacopeia.cn/v29240/images/v29240/g-71.gif ____Benzyl alcohol______________________________________________

Benzoic Acid

2. Identify the relevant peaks for each of the IR spectra and record the position and associated functional group for each in the IR tables.

Benzyl Chloride List position (cm-1) & functional group

4.

1.

5.

2.

6.

3.

7.

Benzaldehyde List position (cm-1) & functional group

4.

1.

5.

2.

6.

3.

7.

Benzyl alcohol List position (cm-1) & functional group

4.

1.

5.

2.

6.

3.

7.

Benzoic Acid List position (cm-1) & functional group

4. 900 OH dimer

1.

5.

2.

6.

3.

7.

Conclusions and Summary

References

Organic Chemistry, Seventh Edition, Paula Yurkanis Bruice

Virtual Chemistry Lab: Organic

Virtual ChemLab v2.5 Organic Synthesis and Organic Qualitative Analysis- Laboratory Workbook Student Manual