Need help 493020) An unknown compound has the chemical formula C4H8O. It's IR spectrum and ¹H NMRspectrum are shown below. Propose a structure for the unknown molecule. Calculate theDegrees of Unsaturation (DU), assign any important peaks in the IR spectrum to vibrationalmodes and briefly explain why the structure fits the ¹H NMR spectrum that is provided.2966 112937 492870 302017 G22716 55179141464 88Degrees of unsaturation (show work below):1872Du = 12 (41+²)-82примир10001459661411 701300 721302 701302 791351 791204 841269 643618220412142711411110 7410901055 941045 6429 66Loca991 01GSD 75234 0161043 06677 AG072 ов520 811731EXPG1) 0hum13501000500Vibrational Assignments of IR PeaksWavenumber (cm-¹) Vibrational AssignmentC-It StretchC =0 Stretch10-8212HSP-04-071=9.76 ppm1HSinglet13/12 =11 10 9 8 7 6ppmBrief rationalization for proposed structure: (explain why DU, IR, andNMR are consistent with proposed structure)0.97 ppm3HTriplet1.64 ppm2HSextet2.37 ppm2HQuadruplet5 4 3 2 1Proposed structure of unknown:

Molecular formula- C4H8O IR hands - 2950, 1730

4930 20) An unknown compound has the chemical formula C4H3O. It's IR spectrum and ¹H NMR spectrum are shown below. Propose a structure for the unknown molecule. Calculate the Degrees of Unsaturation (DU), assign any important peaks in the IR spectrum to vibrational modes and briefly explain why the structure fits the ¹H NMR spectrum that is provided. 2966 11 2937 49 2870 30 2017 G2 2716 $5 1791 4 1464 88 Degrees of unsaturation (show work below): 4872 Du = 12 (417²)-8 2 1000 1469 66 1411 70 1300 72 1302 70 1302 79 1351 79 1204 84 64 1269 36 1822 1214 04 27 1141 1118 74 1000 94 1045 44 29 66 coca 991 01 GSD 75 234 01 043 06 677 BE 672 06 520 81 1721 EMP 613 04 wom партитур www 1350 1000 500 Vibrational Assignments of IR Peaks Wavenumber (cm-¹) Vibrational Assignment C-It Stretch C =0 Stretch 10-8 2 12 HSP-04-071 11 = 9.76 ppm 1H Singlet 13/12 = Brief rationalization for proposed structure: (explain why DU, IR, and NMR are consistent with proposed structure) 0.97 ppm 3H Triplet 1.64 ppm 2H Sextet 2.37 ppm 2H Quadruplet 10 9 8 7 6 5 4 3 2 1 ppm Proposed structure of unknown:

4930 20) An unknown compound has the chemical formula C4H3O. It's IR spectrum and ¹H NMR spectrum are shown below. Propose a structure for the unknown molecule. Calculate the Degrees of Unsaturation (DU), assign any important peaks in the IR spectrum to vibrational modes and briefly explain why the structure fits the ¹H NMR spectrum that is provided. 2966 11 2937 49 2870 30 2017 G2 2716 $5 1791 4 1464 88 Degrees of unsaturation (show work below): 4872 Du = 12 (417²)-8 2 1000 1469 66 1411 70 1300 72 1302 70 1302 79 1351 79 1204 84 64 1269 36 1822 1214 04 27 1141 1118 74 1000 94 1045 44 29 66 coca 991 01 GSD 75 234 01 043 06 677 BE 672 06 520 81 1721 EMP 613 04 wom партитур www 1350 1000 500 Vibrational Assignments of IR Peaks Wavenumber (cm-¹) Vibrational Assignment C-It Stretch C =0 Stretch 10-8 2 12 HSP-04-071 11 = 9.76 ppm 1H Singlet 13/12 = Brief rationalization for proposed structure: (explain why DU, IR, and NMR are consistent with proposed structure) 0.97 ppm 3H Triplet 1.64 ppm 2H Sextet 2.37 ppm 2H Quadruplet 10 9 8 7 6 5 4 3 2 1 ppm Proposed structure of unknown:

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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The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A compound containing no nitrogen exhibits strong, broad absorption across the 2500-3300 cm³¹ region, accompanied by 2200 (w) and 1715 (s) cm-¹ bands. Relative absorption intensity: (s)=strong, (m)=medium, (w)=weak. What functional class(es) does the compound belong to? List only classes for which evidence is given here. Attach no significance to evidence not cited explicitly. Do not over-interpret exact absorption band positions. None of your inferences should depend on small differences like 10 to 20 cm³¹. The functional class(es) of this compound is(are) . (Enter letters from the table below, in any order, with no spaces or commas.) a. alkane (List only if no other functional class applies.) b. alkene c. terminal alkyne d. internal alkyne e. arene f. alcohol g. ether h. amine i. aldehyde or ketone j.carboxylic acid k. ester I. nitrile
20) An unknown compound has the chemical formula CH₂O. It's IR spectrum and ¹H NMR spectrum are shown below. Propose a structure for the unknown molecule. Calculate the Degrees of Unsaturation (DU), assign any important peaks in the IR spectrum to vibrational modes and briefly explain why the structure fits the 'H NMR spectrum that is provided Degrees of unsaturation (show work below): 442 Du= (2(3)+2)-6 2 -8-16 - 2²/2/2 = 1 3437 1739 Amply 0 Vibrational Assignments of IR Peaks Wavenumber (cm-¹) Vibrational Assignment 0-4 stretch 6=0 strekh Peak 1: 9.79 ppm 14 Singlet 3 8 Brief rationalization for proposed structure: (explain why DU, IR, and NMR are consistent with proposed structure) ppm Peak 2 2.45 ppm 2H Quartet Peak 3 1.11 ppm 3H Triplet D Proposed structure of unknown:
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