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An unknown, foul-smelling hydrocarbon gives the mass spectrum and infrared spectrum shown. (a) Use the mass spectrum to propose a molecular formula. How many elements of unsaturation are there? (b) Use the IR spectrum to determine the functional group(s), if any. (c) Propose one or more structures for this compound. What parts of the structure are uncertain? If you knew that hydrogenation of the compound gives n-octane, would the structure still be uncertain? dn Propose structures for the major fragments at 39, 67, 81, and 95 in the mass spectrum. 100 41 80 391 60 40 81 67 20 M' 95 110 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 m/z

An unknown, foul-smelling hydrocarbon gives the mass spectrum and infrared spectrum shown. (a) Use the mass spectrum to propose a molecular formula. How many elements of unsaturation are there? (b) Use the IR spectrum to determine the functional group(s), if any. (c) Propose one or more structures for this compound. What parts of the structure are uncertain? If you knew that hydrogenation of the compound gives n-octane, would the structure still be uncertain? dn Propose structures for the major fragments at 39, 67, 81, and 95 in the mass spectrum. 100 41 80 391 60 40 81 67 20 M' 95 110 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 m/z

Chemistry
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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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An unknown, foul-smelling hydrocarbon gives the mass spectrum and infrared spectrum shown. (a) Use the mass spectrum to propose a molecular formula. How many elements of unsaturation are there? (b) Use the IR spectrum to determine the functional group(s), if any. (c) Propose one or more structures for this compound. What parts of the structure are uncertain? If you knew that hydrogenation of the compound gives n-octane, would the structure still be uncertain? dn Propose structures for the major fragments at 39, 67, 81, and 95 in the mass spectrum. 100 41 80 391 60 40 81 67 20 M' 95 110 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 m/z
Transcribed Image Text:An unknown, foul-smelling hydrocarbon gives the mass spectrum and infrared spectrum shown. (a) Use the mass spectrum to propose a molecular formula. How many elements of unsaturation are there? (b) Use the IR spectrum to determine the functional group(s), if any. (c) Propose one or more structures for this compound. What parts of the structure are uncertain? If you knew that hydrogenation of the compound gives n-octane, would the structure still be uncertain? dn Propose structures for the major fragments at 39, 67, 81, and 95 in the mass spectrum. 100 41 80 391 60 40 81 67 20 M' 95 110 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 m/z
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