17,19,20 17. Sketch the 'H NMR spectrum of the following compounds:18. Sketch the 13C NMR spectra of the compounds in Question 17.H3CBrBrH3CCH3CH3-CtsCH31419. Explain the peaks in the following mass spectra:a. 2-pentanone: m/e 86, 71, 57, 43 (100 %)b. 1,2-dichloroethane: m/e 100, 98, 64, 62 (100 %), 51, 49, 27e Bromocyclohexane: m/e 163, 161 (both very small), 83 (100 %), 55,4120. How would you decide which isomer is which using 'H NMR spectroscomy?a. Diethyl ether and butanolb. Ethyl acetate and methyl propanoatec. Ethylbenzene and p-xylene (1,4-dimethylbenzene)d. 2-Hexene and 3-hexeneRecrystaWhat Is It GLet's beginif the chunrystals coutystals likurse, thisly be accHit beceality,hasan

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Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter43: Amines

Section: Chapter Questions

Problem 9Q

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Analyze the high resolution proton NMR spectrum of a compound with the molecular formula C8H16O2 and find out which one. A. 2-ethylhexanoic acid B. 1,4-cyclohexanedimethanol C. ethyl hexanoate D. butyl butyrate E. ethyl 2,2-dimethylpropanoate
What is the standard solvent in both 1H and 13C NMR? A. (CH3)4Si B. D2O C. CDCl3 D. C6H6 E. none of the above
Draw the structure of the compound identified by the simulated 'H NMR and ¹3C NMR spectra. The molecular formula of the compound is C₁0H₁2O. (Blue numbers next to the lines in the 'H NMR spectra indicate the integration values.) ¹H NMR 1H 2H 2H 2H 2H 3H IT 111 10 8 6 8 (ppm) 13C NMR III. 220 200 180 160 140 60 40 20 100 8 (ppm) Deduce the structure from the spectra. Select Draw More CHO 2 Ć Rings 120 80 Erase Q 2 Q
Account for the formation of the base peaks in these mass spectra. Q.) Isobutylmethylamine, m/z 44
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Which C8H10 compound gives the following 1H NMR spectrum? A. 2 B. 3 C. 1 D. 4
An unknown compound produces an 1H NMR spectrum with only three signals: 1.8, 2.8, 7.5 (broad) ppm, all singlets that integrate in a 6:3:1 ratio, respectively. The 13C NMR spectrum shows 4 signals. Both spectra are provided below. The mass spectrum shows a molecular ion region with the following peaks: m/z 135 (100%), 136 (5.9%), 137 (33%). Determine the number of carbons, molecular formula, and propose a structure. Assign all 1H and 13C NMR signals to specific chemical environments or specific hydrogens in your structure. 'H NMR Spectrum of Unknown 8 6 PPM 13C NMR Spectrum of Unknown 160 140 80 60 100 PPM 180 120 40 20
Chemistry what is it the reang of 1HNMR and 13C NMR spectra for this compound?
Analyse the high resolution proton NMR spectrum of a compound with a molecular formula of C8H16O2 and and write its name. Options: A. 2-ethylhexanoic acid B. 1,4-cyclohexanedimethanol C. ethyl hexanoate D. butyl butyrate E. ethyl 2,2-dimethylpropanoate
3. A molecule absorbs IR at a wavenumber of 1720 cm-1. Which functional group could account for this absorption. I. aldehydes II. esters III. ethers O 1& II 1 & III II ONLY III ONLY
1.Predict the structure that would give the following ¹H and ¹3C-NMR spectra for C₂H5CI: 3.6 ille 9.0 40 3.5 8.0 35 3.4 3.3 CHCl3 7.0 30 6.0 سد 25 1.80 1.70 1.60 5.0 4.0 Chemical shift (8, ppm) 20 PPM 2H T 15 3.0 2.0 10 3H 1.0 5 TMS 0.0 0

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17. Sketch the 'H NMR spectrum of the following compounds: H3C. Br. CH3 CH3 Br H3C 0. CHS CH3 H3C H3C CH3