The following molecular ion isotopic clusters correspond to derivatives of benzene (C6H6) for which one or more of the hydrogens have been replaced with chlorines or bromines. What molecular formula corresponds to each mass spectrum? . 100- 80- 60- 40- Relative intensity 20- -M+6 -M+5 -M+4 M+3 M+1 M+2 M+0 (a) -M+6 -M+5 -M+4 M+3 M+2 M+1 -M+0 (b) M+6 M+5 M+4 M+3 -M+2 -M+1 -M+0 (c) M+6 -M+5 M+4 M+3 M+2 -M+1 -M+0 (d) M+6 M+5 -M+4 -M+3 -M+2 M+1 -M+0 (e)

The following molecular ion isotopic clusters correspond to derivatives of benzene (C6H6) for which one or more of the hydrogens have been replaced with chlorines or bromines. What molecular formula corresponds to each mass spectrum? . 100- 80- 60- 40- Relative intensity 20- -M+6 -M+5 -M+4 M+3 M+1 M+2 M+0 (a) -M+6 -M+5 -M+4 M+3 M+2 M+1 -M+0 (b) M+6 M+5 M+4 M+3 -M+2 -M+1 -M+0 (c) M+6 -M+5 M+4 M+3 M+2 -M+1 -M+0 (d) M+6 M+5 -M+4 -M+3 -M+2 M+1 -M+0 (e)

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter14: Mass Spectrometry

Section: Chapter Questions

Problem 14.27P: Following is the mass spectrum of an unknown compound. The two highest peaks are at m/z 120 and 122....

See similar textbooks

Similar questions

Following is the mass spectrum of an unknown compound. The two highest peaks are at m/z 120 and 122. Suggest a structure for this compound. (Data from http://webbook.nist.gov/chemistry/.)
4. Below are the IR regions and NMR chemical shifts table for use with the spectroscopy problems: 'H NMR 12 R O=C 11 OH 10 9 ΟΞΟ R-C-H 1---- - 00 8 Nitrogen-15 Oxygen-16 Nitrogen-14 7 Phosphorus-31 Sodium-23 Carbon-13 ppm 6 H C=C-H OH 5 NH H-C-X H-C-O -OH X = F, Cl, Br (i.e. electronegative atom) 3 -NH Which of the following isotopes is NOT NMR active? 2 H-C-N H-C-S 1 -CH3 -CH₂- CEC-H H-C-C=O -CH H-C-C=C HC-0 0 4000 DID small range range of values broad peak =C-H 3250- 3300 N-H broad with spikes -3300 3500 -O-H broad-3300 -3400 -O-H -CIN CO N-H H H 2730- 2820 -C-H of =C H 3000- 2 peaks 3100 2850- 2960 H O -C-O-H broad-3000 3000 usually strong -CEN 2200 -CICH ⇓ 2200 2500 wavenumber, cm-¹ 2000 C HC N H 1600- 1660 980 1680 AU OR 1730 O 1710 3 1600 NR₂ 1650 1500 1000 -1.
C2H5ClO2 elucidate thefollowing spectrum and identify the unknown compound
Consider the constitutional isomers of molar mass = 100 represented below. Significant peaks in the mass spectrum occur at m/z = 71 and 57, each as the result of a different a-cleavage of the molecular ion. What is the structure of this isomer? 0 H || IV 01 OH CH₂ A) I B) II C) III D) IV
What type of signal(s) would you observe in the mass and infrared spectrum of the following compound? OD O A signal at 95 amu and 97;amu; absorbance at 1320 cm-1 O Two signals at 93 (100 %) & 95 (6.6 %) amu ;signal at 3370 & 1530 cm-1 O A signal at 95 amu; signals at 3300 and 2980 cm-1 OTwo signals at 94 (100 %) & 95 (6.6 %) amu; a signal at 3600-3200 cm-1 O Two signals at 95 (100 %) & 95 (6.6 %) amu ;signal at 3070 & 1230 cm-1 BARRE
Watch videos (LINKS) on page 2 and answer questions One infrared spectra (1) is given below. (a) Analyze the spectra and tabulate important bands. (b) Circle the possible molecular structure corresponding to the given spectra. Spectra A: 4000 2700 cm ¹ 2700- 2000 cm ¹ 2000 1600 cm 1600 - 400 cm ¹ 2.5 100 80 Region 60 40 20 0 OL 4000 (a) COMPOUNDS A OH 3500 3 -1 3000 B Absorption, cm -1 3.5 4 2500 4.5 SPECTRA 1 CH, O CH, C C CH, H H NO H wavelength (um) 5 5,5 6 2000 1800 1600 wavenumber (cm) wavelength (um) C Functional group CIC C-OH CH, 7 8 1400 1200 D 9 10 n 1000 CH₂CH₂OH - 11 Base Value 12 13 14 15 16 800 600 E Jun CH₂-C-N
Use the following information to propose a molecular formula for nootkatone, a compound partly responsible for the characteristic odor of grapefruit. Nootkatone contains the elements C, H, and O, has ve degrees of unsaturation, and a molecular ion in its mass spectrum at m/z = 218.
-·|· 4.0 Match the peaks in this spectrum with hydrogens on the structure below. A) I: 0.91 ppm II: 3.29 ppm III: 1.52 ppm IV: 3.23 ppm H3C | 3.0 || H₂ CH3 CH CH3 III IV 2.0 ppm 1.0 B) I: 0.91 ppm II: 3.29 ppm III: 3.23 ppm IV: 1.52 ppm C) 1: 3.23 ppm II: 3.29 ppm +
Below is the 13C compound with molecular formula C12H16O. Measured in CDCl3 Assign the carbons by putting the appropriate letter over each peak in the spectrum
4. Match the following spectrum to the structure it represents а. 4000 2000 1S00 100 3000 OH OCH, CH3 он OCH3 он b. eo00 1500 1000 spo 4000 3000 он NH2 co,H но H3 C
Explain the patterns and intensities of the isopropyl group in isopropyl iodide. CH3 CH3 CH-I What spectrum would you expect for the following molecule? CIH CI H-C-C-C-H II CI CI Cl
The volatile organic compounds (VOCs) produced by decomposing tissue and organs were studied in an effort to identify possib human-specific markers (PLoS ONE 2015 10(9): e0137341.). Of 452 VOCs isolated, six were found to be unique to humans, so th prove to be a useful tool for forensic chemists trying to determine the source of unidentified remains. There are two doublets in expected ¹H NMR spectrum of the following human-specific VOC. Identify the protons giving rise to each doublet. 1 2 H3C H3C- оооооооо 238 H 8 HH HH 3 HH CH3 5 7 Identify the two groups of protons that give rise to the doublets in the spectrum. CH3 8