Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter16: An Introduction To Infrared Spectrometry
Section: Chapter Questions
Problem 16.16QAP
Related questions
Question
Discuss interpretation of IR spectrum below.
![Band position (cm1)
Bond type
О-Н
3358 cm
2974 cm' and 2887 cm
С-Н
С-Н
1455, 1381, 1330 cm'
С-О
1090 and 1050 cm-
881 and 669 cm1
С-Н
The strong and broad peak narrowing onto 3358 cm-1 indicates O-H stretching of
alcohol.
The strong and medium peaks at 2974 cm-1 and 2887 cm-1 indicates C-H stretching
of CH or CH2 or CH3
The medium and sharp peaks at 1455,1381,1330 cm-1 indicates C-H bending of CH
or CH2 or CH3
The strong and sharp peaks at 1090 and 1050 cm-1 indicates C-O stretching of
alcohol.
The strong and sharp peak at 881 and 669 cm-1 indicates C-H bending.
Based on the interpretation of IR spectrum, the unknown is an saturated alcohol .](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0b1fcfce-22dc-4873-916d-17b631bc48b4%2Fa6c6fdf5-94ab-4aaa-a689-d661605abc80%2Fy24s5bt_processed.png&w=3840&q=75)
Transcribed Image Text:Band position (cm1)
Bond type
О-Н
3358 cm
2974 cm' and 2887 cm
С-Н
С-Н
1455, 1381, 1330 cm'
С-О
1090 and 1050 cm-
881 and 669 cm1
С-Н
The strong and broad peak narrowing onto 3358 cm-1 indicates O-H stretching of
alcohol.
The strong and medium peaks at 2974 cm-1 and 2887 cm-1 indicates C-H stretching
of CH or CH2 or CH3
The medium and sharp peaks at 1455,1381,1330 cm-1 indicates C-H bending of CH
or CH2 or CH3
The strong and sharp peaks at 1090 and 1050 cm-1 indicates C-O stretching of
alcohol.
The strong and sharp peak at 881 and 669 cm-1 indicates C-H bending.
Based on the interpretation of IR spectrum, the unknown is an saturated alcohol .
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