7. Propose a structure for the alkene having the mass spectrum shown below. Assume that there are no double bond rearrangements occurring. M+ is at 84, major fragments at 69, 43, 41. Identify the major fragmentations/fragments using a proposed structure.. MASS SPECTRUM 100 80 60 40 20 0.0 0.0 20 40 60 80 100 m/z Rel. Intensity

7. Propose a structure for the alkene having the mass spectrum shown below. Assume that there are no double bond rearrangements occurring. M+ is at 84, major fragments at 69, 43, 41. Identify the major fragmentations/fragments using a proposed structure.. MASS SPECTRUM 100 80 60 40 20 0.0 0.0 20 40 60 80 100 m/z Rel. Intensity

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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1. Given the IR and MS spectra, identify the following unknown with molecular formula (C5H10). 0.9 0.75 0.6 0.45 3089 2975 3000. 1648 2000. WAVENUMBER (cm-1) 885 1000. 100.- 80. 60.- 40.- 20. 0. 0. 15 15. d. Propose a structure consistent with this information. 29 c. To what do MS fragments at m/z = 70, 55, and 29 correspond? 30. m/z a. Calculate the hydrogen deficiency index for the molecule (show your work). 45. b. To what do the IR absorptions at 3089, 2975, 1648, and 885 cm³¹ correspond? 60. 70 75.
Write the products and develope the reaction mechanism.
Identify all of the peaks in the spectrum. State the Experimental wavelength, Literature wavelength, peak characteristic, and assignment. DOWN BELOW IS AN EXAMPLE... Experimental Wavelength (cm-1) Literature wavelength (cm-1) Peak characteristic assignment 3001cm-1, 3043cm-1 3010cm-1 sp2 C-H stretching alkene 2924cm-1 2900 -2980cm-1 sp3 C-H stretching Alkyl C-H 1614cm-1 1500 -1650cm-1 C=C stretch alkene 1443cm-1 1350-1450cm-1 C-H bend C-H
Interpret as many of the main peaks in the following spectra as you can – do this by providing the chemical formula of the species responsible for the peak in each case – you don’t need to outline specific fragmentation pathways, unless you want to! The structures of the chemicals are given to help you, as are a couple of the more obvious bond breakages. Need new solutions. Draw chemdraw computerised
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What is the peak (cm -1) Round to whole numbers Intensity /shape ------strong , medium , weak ,broad Assignment ----- bond type responsible for IR. Absorption Please help
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