20. (a) The UV spectrum of acetone shows two peaks at 7-max = 280 nm max 15. = 1900 nm Emax 100. (1) identify the electronic transition for each. (ii) which one of these is more intense ? (b) Why is methanol a good solvent for UV but not for IR determination? and max

20. (a) The UV spectrum of acetone shows two peaks at 7-max = 280 nm max 15. = 1900 nm Emax 100. (1) identify the electronic transition for each. (ii) which one of these is more intense ? (b) Why is methanol a good solvent for UV but not for IR determination? and max

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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Analyzing and Predicting Spectroscopic Data

The interaction of electromagnetic radiation with the structure of molecules in the sample and their study is referred spectroscopy. Several spectroscopic methods are used to acquire sample information, and these methods are proved to be accurate, fast, and non-destructive. The information obtained about the content and composition of molecules from these spectroscopic methods is called spectroscopic data.

Question

20. (a) The UV spectrum of acetone shows two peaks at
15.
7-max = 280 nm max
= 1900 nm Emax
max
and
100.
(1) identify the electronic transition for each.
(ii) which one of these is more intense ?
(b) Why is methanol a good solvent for UV but not for IR determination?
21. (a) How will you detect
C=C-C=Cby UV spectroscopy?
(b) Write why absorption bands are formed in ultra-violet spectrum instead of sharp peaks ?

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