Question 11Given is the mass spectra of n-octane whre peaks are labeled accordingly. Give the letter that corresponds to the peak described below:CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3100F8060EG40BAD10 20 30 40 50 60 70 80 90 100 110 120Which peak is considered as the base peak?Which is peak is the Molecular ion peak?Which the isotopic peak of the molecular ion?Which peak reperesents the (CH3-CH2-CH2-CH2)* fragment?Which is the methyl ion peak?20

We have to predict the peaks for given questions.

Question 11 Given is the mass spectra of n-octane whre peaks are labeled accordingly. Give the letter that corresponds to the peak described below: CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3 100- F 80 60 E G 40 B 20 D H. 10 20 30 40 50 60 70 80 90 100 110 120 Which peak is considered as the base peak? Which is peak is the Molecular ion peak? Which the isotopic peak of the molecular ion? Which peak reperesents the (CH3-CH2-CH2-CH2)* fragment? Which is the methyl ion peak?

Question 11 Given is the mass spectra of n-octane whre peaks are labeled accordingly. Give the letter that corresponds to the peak described below: CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3 100- F 80 60 E G 40 B 20 D H. 10 20 30 40 50 60 70 80 90 100 110 120 Which peak is considered as the base peak? Which is peak is the Molecular ion peak? Which the isotopic peak of the molecular ion? Which peak reperesents the (CH3-CH2-CH2-CH2)* fragment? Which is the methyl ion peak?

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter12: Structure Determination: Mass Spectrometry And Infrared Spectroscopy

Section12.SE: Something Extra

Problem 15AP: Write molecular formulas for compounds that show the following molecular ions in their...

See similar textbooks

Similar questions

What fragments might you expect in the mass spectra of the following compounds?
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/.)
Propose structures for compounds that fit the following mass-spectral data: (a) A hydrocarbon with M+=132 (b) A hydrocarbon with M+=166 (c) A hydrocarbon with M+=84
Following is the mass spectrum of 3-methyl-2-butanol. The molecular ion m/z 88 does not appear in this spectrum. Propose structural formulas for the cations of m/z 45, 43, and 41.
1. What do you suppose is the molecular weight of the molecule that gives the mass spectrum below? Rel Abund 100 27 26 55 HUL 45 40 80- 60- 40- 20- 0. m/z0 10 Rel Abund Relative Abundance Formula 1: 20 Formula 2: Formula 3: 30 50 m/z = mass divided by charge 60 72 70 80 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: 90 100
8. a) Use the mass spectrum to determine the identity of the halogen atom (X) in the following molecular formula. 100 - C3H5XO2 80- 60 40 20- 152 154 20 40 60 80 100 120 140 160 180 200 m/z Relative Intensity
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
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
8. Draw the ions in the mass spectrum of methylcyclohexane that correspond to the m/z peaks of 98 and 83. m/z = 98 m/z = 83
The two mass spectra below correspond to two isomers of C4H10O: 1-butanol and 2-butanol. Match the spectrum with the appropriate compound. Place the m/z ratio and the structures for the labeled fragments in the table below. 100 Compound 00 2 GO 40 - 1 20 - 10 20 30 40 50 60 70 80 90 100 m/ 7 100 Compound 3 80 60 40 20 0 TH 10 15 20 25 30 35 40 45 50 55 60 65 70 75 m/z Fragment 1 Fragment 2 Fragment 3 Fragment 4 m/z Fragment Relative Intensity Re-ative Intersity
3. A molecule with three types of atoms has the mass spectrum shown below. The molecular ion peak has an intensity of 23 and the (M+1)* peak has an intensity of 1.3. What is the molecular formula for this compound? 100- |72 80- 44 60- 40- 2어 20 30 40 50 m/z 10 60 70 80 90 Relative Intensity
19. 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, 27 c. Bromocyclohexane: m/e 163, 161 (both very small), 83 (100 %), 55, 41.