INSTRUMENTAL ANALYSIS-ACCESS >CUSTOM<
7th Edition
ISBN: 9781337783439
Author: Skoog
Publisher: CENGAGE C
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Chapter 8, Problem 8.3QAP
Interpretation Introduction
Interpretation:
In atomic spectroscopy, conditions for occurrence of Stokes shift is to be explained.
Concept introduction:
Explanation of different conditions for Stokes shift is done by understanding the concept of Stokes shift.
Stokes shift can be described by the difference of maxima of absorption and emission of transition of an electron.
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When an unknown amine reacts with an unknown acid chloride, an amide with a molecular mass of 163 g/mol (M* = 163 m/z)
is formed. In the infrared spectrum, important absorptions appear at 1661, 750 and 690 cm. The 13C NMR and DEPT spectra
are provided. Draw the structure of the product as the resonance contributor lacking any formal charges.
13C NMR
DEPT 90
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160
120
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DEPT 135
T
200
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Draw the unknown amide.
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