Identify some characteristic group frequencies in the spectrum of an organic molecule shown below and identify the class of molecules to which it belongs. Propose a struc- ture if you can. a (um) 7 8 9 10 11 12 1314 15 2.5 100 3 20 90 20 10 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 600 400 Frequency (cm-1) Transmittance (%)

Identify some characteristic group frequencies in the spectrum of an organic molecule shown below and identify the class of molecules to which it belongs. Propose a struc- ture if you can. a (um) 7 8 9 10 11 12 1314 15 2.5 100 3 20 90 20 10 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 600 400 Frequency (cm-1) Transmittance (%)

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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Molecular Formula: C10H14 8 LOD TRANSMITTANCE1% D 4000 STRUCTURE: mult. t 2.72 q 6.90 S d t ppm 1.18 7.11 7.53 3000 H 6 4 1 2 1 5 2000 SPECTRUM 5 4 PPM HAVENUMBERI-L 1500 3 1000 500
Find the structural shape of the compound according to the infrared spectrum ?
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Identify all the peaks from the IR spectrum. Be sure to list the cm-1 and the bond that corresponds to each peak.
Identify the structure and the peaks. Specify the important absorptions. Draw the correct structure of the unknown and find IHD.
Which compound corresponds to the IR spectrum shown below?
Identify as many peaks as possible. This is the IR Spectroscopy of an unknown liquid sample.
Assign the hydrogens in C7H14O to this structure
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Ee.69.
2. READ THE DIRECTIONS TO EACH QUESTION CAREFULLY - not following the directions means you get the question wrong! 3. FORMAT YOUR ANSWERS AS DIRECTED - formatting your answers incorrect means you get the question wrong! 4. Below are the IR regions and NMR chemical shifts table for use with the spectroscopy problems: ¹H NMR 12 11 10 9 R O=C OH R O=C H CO 8 7 ppm 6 OH H C=C-H 5 NH H-C-X H-C-O -OH X = F, Cl, Br (i.e. electronegative atom) 3 -NH- 2 H-C-N H-C-S C=C-H H-C-C=C HC 1 H-C-C=O-CH -CH3 -CH₂- 0 4000 ID small range range of values broad peak =C-H N-H 3250- 3300 broad with spikes -3300 3500 -O-H broad-3300 -3400 -0-H CEN N-H H H 2730- 2820 -C-H usually CO CO strong =C H 3000- 2 peaks 3100 I 2850- 2960 H O <-C-O-H broad-3000 3000 -CEN ↓ 2200 -CICH B 2200 2500 wavenumber, cm-1 2000 H CC CN H 1600- 1660 1680 0000000 OR 1730 1710 1600 NR₂ 1650 1500 1000
The frequency of microwave transition from J-0 to J-1 for ¹2C¹60 is given as 3.845 cm l.Calculate the C-O bond distance using a rigid rotor model. (h=6.627x 1034 J.S, C=2.99x10³ m.s", NA=6.023x 10³). I = M. n²