Purity of the ester: use the colour of the product and the information from the infrared spectrum to assess the purity of the ester. The color of product was yellow. Was orang Odour made with acetic acid on a 0.10 molar ratio and 1-Octanol 0.05 molar ratio.
Purity of the ester: use the colour of the product and the information from the infrared spectrum to assess the purity of the ester. The color of product was yellow. Was orang Odour made with acetic acid on a 0.10 molar ratio and 1-Octanol 0.05 molar ratio.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Purity of the ester: use the colour of the product and the information from the infrared spectrum to assess the purity of the ester.
The color of product was yellow.
Was orang Odour made with acetic acid on a 0.10 molar ratio and 1-Octanol 0.05 molar ratio.
Transcribed Image Text:100
90
80
70
60
50
40
3500
3000
Orange ester
2018.39
2500
2000
Wavenumber cm-1
1466.25
1500
1000
500
Transcribed Image Text:Correlation Table for Infrared Spectroscopy
Frequency of Intensity/Shape
absorption
(cm-1)
3650-3590
3600-3200
3400-2400
3500-3300
3340-3270
3100-3000
2960-2850
Strong/sharp
2850-2810 and Medium/ sharp
2750-2700
2260-2220
2260-2100
Medium to strong/
sharp
Weak to medium/
sharp
Strong/sharp
Strong/sharp
Strong/sharp
Strong/sharp
1730-1680* Strong/sharp
1800 and 1750
1810-1760
1750-1730
1740-1680
1720-1680
1700-1630
Strong/sharp
Strong/broad
Strong/ very broad
Medium to strong/
sharp
Strong/sharp
1680-1620
Weak to medium
1600-1450
Strong/sharp
Strong/sharp
Bond/Class of
Compounds
O-H/ alcohols, phenols
O-H/ alcohols, phenols
O-H/ carboxylic acids
N-H/ 1° and 2° amines
and amides
C(sp)-H/ terminal
alkynes
C(sp²)-H/alkenes,
aromatic compounds
C(sp³)-H/ alkanes
C-H/ aldehydes
C=N/nitriles
C=C/ alkynes
C=0/anhydrides
C=0/ acid chlorides
C=0/esters
C=0/ aldehydes
C=0/ ketones
C=0/amides
Additional Comments
Weak to medium/
C=C/ alkenes
sharp
Variable intensity/ C=C aromatic
sharp
Free (not hydrogen bonded)
OH group
Hydrogen bonded OH group
Dimers of carboxylic acids
1° amines and amides give
two absorptions, 2⁰ - one
Usually two absorptions,
one-2820, another -2720
Might not be visible in internal
alkynes
Always two absorptions
Aliphatic: 1740-1720
Aromatic: 1720-1680
C=0/ carboxylic acids Dimer, 1720-1700 aliphatic,
1700-1680 aromatic
Aliphatic: 1730-1700
Aromatic: 1700-1680
1° and 2° amides 1700-1670,
3⁰-1670-1630
1640-1620 if a conjugated
double bond
* Angle strain in the carbonyl group, caused by the size of a small ring, increases the frequency of
the absorption position of the C=0 bond of cyclic ketones; in cyclohexanone the absorption shows
at 1715 cm-¹, in cyclopentanone at 1750 cm-¹, and in cyclobutanone at 1785 cm-¹.
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