Spec packet 2 (1)

19. For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product? DMSO A. absorption at 3200-3600 cm should disappear B. absorptions at 3200-3600 cm and 1100 om should disappear C. absorption at 1100 cm should disappear, a new absorption at 3100 cm should appear D. absorption at 1720 cm should appear, absorption at 3200-3600 cm should disappear E. none of these O A O B O D O E

refer to image please please label graph and show all work. CALCULATE R VALUE AND EXPLAIN.   will only rate if graph is labelled.   label name of structure too.

Chemistry How many ¹H NMR signals does 2-chloro-3-methyl-2-butene exhibit? Assume both allylic methyl show as chemically equivalent in the NMR. 01 02 03 04 05

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Explanation and circle answer please

Please help

Help please

3 2 1.9 PPM 2.2 2.1 2.0 1.1 PPM 8 7 4 1 8 (ppm) frequency 3 2.6 2.5 2.4 PPM 1.1 1.0 PPM 8 7 6. 4 3 2 8 (рpm) frequency

LAB Q5. Draw the structure of the synthesized product (do not include side or by products). How can IR spectroscopy be used to monitor the progress of each of the following reactions (if reaction went to completion and/or check the purity of the final product)? What absorptions would be observed in the IR spectrum? And if IR spectroscopy could not have been used, briefly explain why.

Task 2: Systematically analyze the IR spectra 1-4 presented on the following pages and match them with the structures of compounds indicated below. Label the diagnostic absorptions on the spectra and then complete the table below each spectrum. Note: The number of structures provided below is more than the number of spectra provided. The structures indicated below are constitutional isomers of C4H602. OH HO. HO Но. compound 1 compound 2 compound 3 compound 4 compound 5 compound 6 Spectrum 1: FTIR NEAT 100 90 IN 80 3p93.3 1625.7- 592.9 70 406 9 60 848.5636.4 977.7 1294.0 50 L9507877. 40 1020 30 1646 9 1371.1 20 1137.8 1762.6 1218 8 45 00 42 50 4000 37 50 3500 3250 30 00 27 50 2500 2250 2000 1750 1500 1250 1000 750 500 250 Wavenumbers (cm-1) © 20 18, Sigma-Aldrich Co. ALL RIGHTS RESERVED Bond vibration Expected frequency range (cm-1) (from IR absorption table) Observed absorption (cm-1) Functional group(s): Structure: % Transmittance

Circle the solvents from the following list that can be used with 1H NMR spectroscopy that do not interfere with the spectrum.   carbon tetrachloride chloroform benzene-d6   hexachloroacetone acetonitrile acetone   methylene chloride D2O DMF (dimethylformamide)

For each NMR, label any and all triplets, singlets, etc. Propose a structure that matches each NMR spectrum.

Construct a 1H NMR spectrum for the compound shown below.

Which compound best fits this IR?

9.

Determine the 2 molecules based on the 1H NMR data.  Explain the key features that helped determine the 2 molecules.

LAB Q2. Draw the structure of the synthesized product (do not include side or by products). How can IR spectroscopy be used to monitor the progress of each of the following reactions (if reaction went to completion and/or check the purity of the final product)? What absorptions would be observed in the IR spectrum? And if IR spectroscopy could not have been used, briefly explain why.

LAB Q1. Draw the structure of the synthesized product (do not include side or by products). How can IR spectroscopy be used to monitor the progress of each of the following reactions (if reaction went to completion and/or check the purity of the final product)? What absorptions would be observed in the IR spectrum? And if IR spectroscopy could not have been used, briefly explain why.

Drag the appropriate labels to their respective targets. Note: not all labels can be used. oC(sp) – C(sp²) σC(sp) - C(sp) C(sp²) - C(sp²) oC (sp) - H(s) σC(sp²) - H(s) TС(px) - C(px) TС(Py) — С(Py) TС(P₂) - C(pz) H H

Please help! Rank the first two groups in order of SN1 sensitivity and the second group in order of SN2 sensitivity. Halide ranking advice appreciated

help me please. thanks

Identify the spectra. All pertinent peaks must be assigned on spectrum (5-6 peaks). Label the peaks on spectrum.  I have provided the correct structure in the lower left hand corner, I just need help with labeling the peaks on the spectrum to match the structure.

5 2. Spectra for the following compounds are shown on the next few pages. Match up each compound to its spectrum. Indicate which absorption bands (wavenumber and functional group) helped determine your answer. Compound CHỊCH NHCHCH, 田 CEN H NH2 Spectra Letter (A-M) Key Absorption Bands Functional Group and Wavenumber 2

Match the spectra to the structures: 3-bromotoluene and methyl 4-methoxybenzoate. CH 3 3-bromotoluene 200 Spectrum B 200 Br (ignore the CDCI3 signal) CH3O methyl 4-methoxybenzoate OCH3 Spectrum A 100 100

draw the structure of the nmr (ethyl acetate) then circle the protons on the structures and correlate the 1H's to the resonances (peaks) on the 1H NMR spectra.

CHM 2410Z - Organic Chemistry I Lab 1) Consider the following molecules and choose the two represented by the spectra below. Use the IR spectra to narrow the possibilities, and then use the NMR data to confirm your choice. a. 1H NMR data: 85.8 ppm (1H, pentet) 85.0 ppm (1H, triplet) 8 4.9 ppm (1H, triplet) 83.6 ppm (2H, triplet) 8 2.2 ppm (2H, quartet) 82.1 ppm (1H, singlet) 8 1.7 ppm (2H, pentet) b. 1H NMR data: 8 2.4 ppm (2H, triplet) 82.1 ppm (3H, singlet) 8 1.6 ppm (2H, sextet) 8 0.9 ppm (3H, triplet) IR/NMR Postlab i IR spectrum: IR spectrum: Relative Transmittance 0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2 3000 3000 OH H 2000 H 2000 Wavenumber (cm-1) Wavenumber (cm-1) H 1000 1000 OH

ASSIGNED QUESTIONS· - 1. Compound A is converted into compo:ind B with LIAIH4. Treatment of comoound A with strong minerat acid at elevated temperatures yields compound f. Re- đuction of çompound f with LIAIHA gives compound p. Spectra for the compounds are shown below. Write structures for compounds . R. £ and R. Compound A LiAIHy B Cg Hn N Ht LiAl Hy, D cg HioO WAVNO CO IR - Spectrum 4=? IR = ? NMR Spectrum 5 TMS uV Spectrum Absorbance X 100