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- The following ¹H NMR spectrum is shown in two questions. "nmrsim presentation" 1 1 C:\Bruker TopSpin3.5p17\examdata 10 1,4-Disubstituted benzene ring Which functional group is BEST attributed to the pair of doublets at about 7-8 ppm, each integrating to 2H? trans-alkene Cyclohexene Carboxylic acid [ppm] 1,3-Disubstituted benzene ring [oa]QUESTION 3 Predict the IR absorption bands (peaks) observed in the spectrum of 3-methylcyclohexanone. sp3 C-H stretching (-2850-2960 cm 1) sp2 C-H stretching (-3000-3100 cm-1) Alcohol O-H stretch (-3300 cm-1, broad) C-O double bond stretch (-1700 cm-1) Aromatic out of plane bend for monosubstitution (690-710 and 730-770 cm-1). Aromatic out of plane bend for para (1,4) disubstitution (810-840 cm-1). Aromatic out of plane bend for meta (1,3) disubstitution (690-750 and 750-810 cm 1). Aldehyde C-H stretch (2750 and 2850 cm-1). Carboxylic acid (carboxy group) O-H stretch (-2500-3000 cm-1, broad) N-H stretch (2 bands at -3400 cm-1) N-H bend (-1600 cm*1) Aromatic C-C double bond stretches (-1500 and 1600 cm-1). Aromatic overtones (1667-2000 cm-1) O O O OPls help ASAP, thanks! "A compound exhibits a peak at 1685 cm-1 in its IR spectrum. Describe how 13C NMR can be used to identify the functional group."
- The proton NMR spectrum for a compound with formula C10H12O2 is shown below. The infrared spectrum has a strong band at 1711 cm-1. The broadband-decoupled 13C NMR spectral results are tabulated along with the DEPT135 and DEPT90 information. Draw the structure of this compound.Acidcatalyzed dehydration of 3hydroxy3phenylcyclohexanone leads to an unsaturated ketone. What possible structures are there for the product? At what position in the ER spectrum would you expect each to absorb? If the actual product has an absorption at 1670 cm-1, what is its structure?Dtermine the reagents that can accomplish the rxn CH2OH (1) Reagent ? (2) Reagent ? C9H1202 (4) Reagent ? (3) H+ a. (1) SOC12 (2) 1-propanol; (4) PCC/pyridine b. (1) NaH, (2) acetone, (4) NABH4 c. (1) NaH, (2) epoxide (4) PCC/pyridine d. (1) Jones reagent, (2) NaH, (4) epoxide
- The following two mass spectra represent 1-bromo-4-ethylbenzene and (1-bromoethyl)benzene, respectively. 100 - MS-IU-9451 Spectrum 1 80 - 60 40 20 - 25 50 75 100 125 150 175 m/z 100 - MS-NU-8350 Spectrum 2 80 - 60 20- 20 40 60 80 100 120 140 160 180 200 m/z 1. Assign each spectrum to one compound 2. Justify your assignment by assigning relevant signals in each spectrum. 3. Explain how you could determine which spectrum belongs to which compound. Relative Intensity Relative IntensityPlease identify compound 1 and compound 2!!! Attached is the H-NMR and IR for both compounds (ignore the IR peaks ~2400). The experimental melting point for the aqueous layer was 260-261 celcius. The experimental melting point for the organic layer was 76.9-78.7 celcius. The following was my procedure: IntroductionThe reaction mixture in this experiment contains 4-bromobenzaldehyde, methanol, and aqueous potassium hydroxide. A reaction occurs that produces two organic compounds, compound 1 and compound 2. Both are solids at room temperature. Your task is to isolate, purify, and identify both compounds. A specific procedure is given for preparing the compounds, but you will need to work out the procedures for most other parts of this experiment.Experimental ProcedureThis procedure should produce enough of each compound to complete the experiment; however, in some cases, it may be necessary to run the reaction a second time. Although this experiment can be done individually, it works…Following are the 'H and 13C NMR spectra for each of four isomeric bromoalkanes with formula C4H9B.. Assign a structure to each pair of spectra and assign all H's and C's. Carbon spectrum C,H,Br CDCI3 85 80 75 70 65 60 55 50 45 35 30 15 10 5 Proton spectrum D C,H,Br 2.1 2.0 1.9 1.82 0.93 5.37 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0
- į. A sample of edible oil was subjected to analysis using mass spectrometry (MS). The following mass spectra (X and Y) were obtained. The spectra represent 2,4- decadienal and squalene. Identify the spectrum of 2,4-decadienal and squalene and explain your answer. H3C. H 2,4-decadienal Squalene 81 0.2- 0.1 -41 67 95 1231 L 10352 100 200 300 400 500 m/z X 0.2- 69 0.15 - 81 0.1 - 0.05 .41 95 10949,7520sg83P8732 334136BDE234494891 100 200 300 400 500 m/z Y Scaled Intensity Scaled IntensityPropose 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/zMatch 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