Concept explainers
Interpretation:
How the given compounds (
Concept Introduction:
High resolution mass spectrometry: This method allows
Masses are generally not whole number integers, for example 1 proton =
One
All atoms other than
Nominal mass: The nominal mass for an element is the mass number of it is most abundant naturally occurring stable isotope and for an ion or given molecule the nominal mass is the sum of the nominal masses of the constituent atoms.
Example: The exact mass of the most abundant isotopes of each element
For example hydrogen
Average atomic mass value:
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Organic Chemistry
- Halogenated compounds are particularly easy to identify by their mass spectra because both chlorine and bromine occur naturally as mixtures of two abundant isotopes. Recall that chlorine occurs as 35Cl (75.8%) and 37Cl (24.2%); and bromine occurs as 79Br (50.7%) and 81Br (49.3%). At what masses do the molecular ions occur for the following formulas? What are the relative percentages of each molecular ion? (a) Bromomethane, CH3Br (b) 1-Chlorohexane, C6H13Clarrow_forwardCan a low-resolution mass spectrometer distinguish between C2H5+ and CHO+? a. Can a high-resolution mass spectrometer distinguish between them?arrow_forwardA compound containing only carbon, nitrogen, oxygen, and hydrogen contains four carbon atoms. If the M+ peak in its mass spectrum appears at m/z = 87, then how many nitrogen atoms does it contain?arrow_forward
- CO9TO9Q4167 The mass spectrum of an unknown compound has a molecular ion peak with a relative intensity of 54.77% and an M+1 peak of 6.66%. How many carbon atoms are in the compound? (Fill in an integer number)arrow_forwardDraw the molecular ion (M) for this molecule formed in the mass spectrometer. H IIZ: H -e Qarrow_forwardHow can you distinguish aldehydes, ketones, and carboxylic acids from each other using IR spectra? Explain using specific examples.arrow_forward
- Shown below are the IR spectrum and the Mass Spectrum of a compound of molecular formula C3H8O. Using the spectral data, determine the structure of the compound. Provide evidence from both spectra to support your answer.arrow_forwardAter analyzing a mass spectrum you conclude that the molecule being analyzed has the molecular formula C4H8; however, there are five possible constitutional isomers with that same molecular formula. the only thing that stands out in the mass spectrum is a strong fragment signal at m/z=41. Determine the possible constitutional isomers for C4H8 and explain which isomer matches the mass spectrum.arrow_forwardWhat is the difference between mass spectroscopy and mass spectrometry?arrow_forward
- Is the compound giving rise to the mass spectrum shown here more likely to contain sulfur, bromine, or chlorine? Explain. 100 80 - 60- 40 20 40 80 120 160 m/z Relative abundance -유arrow_forwardAnalyze the mass spect (including fragmentations) for the molecular structure of vanillin (C8H8O3). M=152arrow_forwardThere is mass spectrum. What is the molecule compound name?arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning