Question

Using the data provided below. Fill out the tables regarding the FTIR and NMR Spectra for 2-methyl-2-ethoxypropane.

FTIR and NMR Spectra After completing a reaction and working up the products, it is still necessary to confirm that the correct product was formed. The most common tools used for this analysis are Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. In the virtual laboratory, 'H and ''C NMR spectra are available. Details on interpreting FTIR and NMR spectra are found in your textbook. Your instructor may or may not ask you to perform this section depending on how your class is structured. 5. To collect an FTIR spectrum of your product, click on the FTIR spectrometer located to the right of the lab bench and drag the salt plate icon to the flask on the lab bench. A window containing the FTIR spectrum for your product should now open. Identify the relevant peaks in the FTIR spectrum and record the position and associated functional group for each in the FTIR table below. The FTIR spectrum can also be saved to the lab book for later analysis. FTIR List position (cm') & functional group 4. 1. 5. 2. 6. 3. 7. 6. To collect a 'H NMR spectrum of your product, click on the NMR magnet located to the right of the chalkboard and drag the NMR sample tube to the flask on the lab bench. A window containing the NMR spectrum for your product should now open. You can zoom into various portions of the NMR spectrum by clicking and dragging over the desired area. The Zoom Out button is used to zoom back out to view the full spectrum. Identify all of the peaks in the NMR spectrum and record the chemical shift, the splitting, and the number of hydrogens for each peak in the NMR table below. The NMR spectrum can also be saved to the lab book for later analysis. 1H NMR Chemical Chemical Peak Multiplicity H Peak Multiplicity H Shift (8) Shift (8) 1 7 Structure: 2 8 C6H140 3 9 4 10 5 Name: 2-methyl-2- 11 Jethoxypropane 6 12 Specify the multiplicity as a singlet (s), doublet (d), triplet (t), quartet (q), or multiplet (m). + Specify the number of hydrogens associated with each peak. 7. Do the FTIR and NMR spectra you measured and recorded in the tables above confirm that you synthesized the assigned target compound? Explain.

Answer 1

2- Methyl - Zethony propane FTIR Sheaking CH3 1399-1450 cm 1465 2 CH2 3 с — Н 360o - 2850 cm) 1300 1000 cm 1 4 C-0 Haw NIMR Chemical Shift Multiplicity quatret (9) 2 PEAK 2.6-2.7ppm 3 triplet (+) 1.2-1.3 ppm 2) 9 singlet (s) Ppm 3) Hisht. 208.87 X 2 2 giren 208.87 208.87 309.18 309. 18 1,48 * 2 -2.96* 3 2 -) 208.87 3 986.27 986.21 4. + 2 =1.449 CH₂ - CH3 2.8.87 CH3 3

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