5. Draw the structure that corresponds to the peaks labeled A – E for themass spectrum of heptane. Circle and label the base peak, M* peak, andM+1 peak.100-80-60-4020Relative abundanceABсE0D-20406080100120m/z6. Answer the following questions based on the mass spectrum shown below.Mal-Lippolis, Nesle CHEM 2423 Spring Mx mass spectrometry on The Mes Spectromex mass spectrometer Digital Resources for X Sdigitalnorton.com/47385AppImported from Google Google Maps Dogle.com Som experiments Home Gym WOC Sign your a€ CH16HWRel. IntensityMASS SPECTRUM1008060-4020-35%0.0+20406080100120m/zNIST Chemistry WebBook (http://webbook.nist.gov/chemistry)lippolisn@wcjc.edu< 07/33 >SUBMIT ANSWERA. Which peak is the base peak?B. Which peak is the molecular ion?c. What is the M + 1 peak?D. What is the M + 2 peak?E. What heteroatom exists in the above mass spectrum?F. What is the molecular formula?

2.A. Base peak is 69. B. Molecular ion peak is 104. C. M+1 peak we found for isotopic distribution…

Answered: 5. Draw the structure that corresponds…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 2CTQ

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Consider the mass spectrum below. 100 80- 60- 20 0.0- 0.0 60 100 miz SDBS, National Institute of Advanced Industrial Science and Technology Which peak is the molecular ion? Choose one OA OB OD. OG
A low-intensity peak at ?/? = 31 can be seen in the mass spectrum of methyl acetate in Figure 3. Propose a fragment that could originate from methyl acetate and be responsible for this peak.
Model 3: Ionization and Fragmentation Most mass spectrometers accelerate a molecule by first turning it into an ion, then using an electric field to accelerate it toward the detector. During standard ionization, a molecule loses one electron, the electron that is easiest to remove. The following is a hierarchy of electrons from easiest to hardest to remove: Electron in a lone pair (easiest) Electron that is part of a double bond (pi bond) Electron in a single bond (hardest) Knocking off an electron to make a +1 ion can be a harsh process. This harsh treatment often results in a broken bond, generating two smaller pieces, a +1 ion and a neutral fragment. (Note that only the ion is accelerated and detected.) ● 7. ● Critical Thinking Questions 6. If acetone is ionized, which electron is most likely to be knocked off? Replace this electron with a + (to indicate the missing electron) on the structure of acetone → The ion you drew above is called the "molecular ion" of acetone. It is…
11. Determine the fraqmentation of the structure shown below that produced the fragment at m/z = 98 (base peak).
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The first image is the product, based on the NMR confirm that structure. If it helps M+ peak =329
100 80 H3C 60 40 CH3 H3C 20 H3C 0.0 0.0 15 30 45 60 75 90 m/z Figure 3. Positive ion mass spectrum of methyl acetate. Note that the peak with the greatest relative intensity is not that of the parent ion fragment. Note in Figure 3. that the peaks corresponding to m/Z= 29 and 42 correspond to fragments which resulted from more than a single bond-breaking event. Rel. Intensity 0=U
the mass spectrum, IR and 13 C and 1 HNMR spectra for an unknown organic molecule. Determine the structure ofthe molecule.
1. Which one of the given compounds is consistent with the mass spectrum below? 100 40 20 10 20 25 30 35 40 5o 55 45 60 65 70 75 m/z Courtesy of SDBS: National Institute of Advanced Industrial Science and Technology A. CH,CH,CH(CH,), В. CH,CHOHCH,CH, C. CH,CH,OCH,CH, D. CH,CH,NHCH,CH, E. CH,CH,CH,CH, Relative htensity
Could someone help me predict the most staple peak, M+, for this mass spectrum? Thank you!!
1. Given the parent compound, chlorobenzene, draw the mass spectrum fragment that is observed at m/z 77. Include any hydrogen atoms and the charge. H H C H H H 2. Given the parent compound, isobutyl-benzene, draw the mass spectrum fragment that is observed at m/z 91. Include any hydrogen atoms and the charge. CH3 CH3
1. What do you suppose is the molecular weight of the molecule that gives the mass spectrum below? 27 Hai 55 26 45 30 40 50 Rel Abund 100r 80- 60- 40- 20- 0- m/z0 10 Rel Abund = Relative Abundance Formula 1: 20 Formula 2: Formula 3: m/z = mass divided by charge 3. What is the base peak? 2. Provide three different molecular formulas (organic molecules, please) that are possible for a molecule with the molecular weight you have chosen. What are the degrees of unsaturation (SODAR) for each? Degrees of unsaturation: Degrees of unsaturation: Degrees of unsaturation: 60 4. Draw a possible molecule for each formula. based on Formula 1 5. Which structure do you think is correct? 72 70 based on Formula 2 80 What mass is lost from the molecular ion to get to the base peak? 90 100 based on Formula 3

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