Directions: Identify the major IR absorptions. Once you have deduced the structure of the unknown, write the name of the unknown compound. (Note: Refer to the simulation: control menu – observe, part of the activity). IR Spectra of Aspirin:

Directions: Identify the major IR absorptions. Once you have deduced the structure of the unknown, write the name of the unknown compound. (Note: Refer to the simulation: control menu – observe, part of the activity). IR Spectra of Aspirin:

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL4: Proton (1h) Nmr Spectroscopy

Section: Chapter Questions

Problem 15E

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Concept explainers

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.

Question

ANALYSE, PLOT AND GIVE THE CORRESPONDING FUNCTIONAL GROUP OF THE FOLLOWING PEAK

Directions: Identify the major IR absorptions. Once you have deduced the structure of the unknown, write the name of
the unknown compound. (Note: Refer to the simulation: control menu – observe, part of the activity).
IR Spectra of Aspirin:
1.0
Intensity
0.9
0.8
.7
3.6
0.5
0.4
0.3
0.2
0.1
0.0
3000
2500
2000
1500
IR Spectra of Caffeine:
O Intensity
10000
so00
6000
4000
2000
3500
3000
2500
2000
1500
1000
500

Definition Definition Group of atoms that shape the chemical characteristics of a molecule. The behavior of a functional group is uniform in undergoing comparable chemical reactions, regardless of the other constituents of the molecule. Functional groups aid in the classification and anticipation of reactivity of organic molecules.

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