Mass Spectrometry

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I don’t understand this Chemistry question and need help to study.

Spectroscopic Analysis, see the attached file and show all work for this problem. You may want to write your

answers on a piece of notebook paper

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J C,j 254 Spectroscopic Analysis Name: Date: Lab Section: Mass Spectrometry ¢,,,J Problems ¢,,J Directions: Show all work for this problem. You may want to write your answers on a piece of notebook paper, Assign a structure that would be expected to give rise to each of the following mass spectra. Note: Some of these problems may have more than one reasonable answer. In some cases, infrared spectral data have been included in order to make the solution to the problems more reasonable.,You will need to use the Rule of Thirteen and the Index of Hydrogen Deficiency to do these problems. t 1. The IR spectrum of this sample gave a medium-sized peak around 1600 cm-1 as well as a peak around 3100 cm-L 100 HS-NW-IS89 80- c60- j q) ,>_ 4O JsJ 2O 25 50 75 100 i"TI/Z 125 150 175 I Mass Spectrometry Operation 2. The infrared spectrum has a medium-intensity peak at about 1650 cm-1. There is also a C-H out-of-plane bending peak'near 880 cm-1, as well as C-H peaks at 3100 and 2950 cm-k 100 MS-NW-3188 80- ¢- 6O __c ,>_ 4O O2 20 , ÿ,ÿlÿlÿlÿlll 10 20 I .,I, II ....... I, illlllJlJlllJJllJllllltll 50 m/z 60 IIÿll,iÿilii[ 70 80 43 I 256 Spectroscopic Analysis 3. The infrared spectrum of this unknown compound shows a strong peak near 1725 cm-1. Note: the MW of this compound is 72 amu. Hint: there are two possible structures to this problem. 100 118-I W-3442 rf ÿ 80- ,nu €- ,_> cÿ 40- 2O 25 5O 75 loo 125 150 175 m/z j | I ''1 V v t v ' k f y t \ r \Y ...
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madushan (3607)
Carnegie Mellon University

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