Concept explainers
Interpretation:
The value of
Concept introduction:
In a mass spectrometer, the molecules of the compound are bombarded with high energy electrons. This generally results in one electron from the molecule being knocked out. The resulting ion is a radical ion, with an odd number of electrons, called the molecular ion. Since the mass of an electron is negligible, the mass of the molecule and the molecular ion are essentially the same.
The molecular ion is a high energy species and breaks into a number of fragments, one of which carries the charge. Another source of fragmentation is the bombarding electrons themselves. These electrons often have energies sufficient to not just knock out an electron but also enough to break bonds.
The only species detected in the mass spectrometer are the charged species, and their separation is based on the
The mass spectrum shows the distribution of the relative abundance of various ion fragments as a function of their
This means the
Sulfur has three isotopes of mass number 32, 33, and 34. The abundance of
Want to see the full answer?
Check out a sample textbook solutionChapter 16 Solutions
Organic Chemistry: Principles and Mechanisms (Second Edition)
- In what ratios would the peaks of an sextet (a signal with six peaks) appear?arrow_forwardIdentify the following spectra. Please find peaks are assigned on the spectrum (~5-6 peaks). Label the peaks on the spectrum and place the structure of the compound in the box on the lower left-hand corner of the spectrum (from the table below, no numbering scheme). You do not have to indicate the exact wavenumber of the peak.arrow_forwardYour turn: draw structure and properly label the following spectrum for isopropyl acetate (1- methylethyl ethanoate). What do the curvy lines mean? 10 ¹H NMR 300 MHz 9 8 C5H1002 Septet Singlet Doublet 0arrow_forward
- Order the following protons from lowest to highest chemical shift value.arrow_forwardPlace the labeled protons (a-e) in order of increasing chemical shift value. HD Hc He Hd Ha V(Choose ] 4-one smaller than the largest 2=one bigger than the smallest Hb 1ssmallest 5-largest 3. Hc (Choose] Hd ( Choose) He (Choose]arrow_forwardIdentify each signal showed in the spectra for both C4H10O and C5H10O. Determine the multiplicity and integrity for each signal.arrow_forward
- Based on the spectra you located, does your molecule have a carbonyl? If so, what functional group is it a part of (carboxylic acid, ketone, aldehyde, ester, amide) and what is the frequency (in wavenumbers) of the absorption peak? If not, what is the approximate frequency range for a carbonyl? Does your molecule have either an –O-H or –N-H bond? If so, what functional group is it a part of (carboxylic acid, alcohol, amine, amide) and what is the frequency (in wavenumbers) of the absorption peak? If not, what are the approximate frequency ranges for an –O-H and an –N-H bond? Does your molecule have either an alkyne or nitrile functional group? If so, which functional group is it and what is the frequency (in wavenumbers) of the absorption peak? If not, what is the approximate frequency range for a triple bond?arrow_forwardQuestion Completion Status: QUESTION 2 Match the hydrogens on the structure below to the appropriate signals and splitting C. N NH он 1. 1.59 ppm, m, 2H va 2. 5.46 ppm, s, 2H 3. 1.31 ppm, sextet, 2H 4. 2.87 ppm, t, 2H 5. 7.29-7.33 ppm, m, 4H ve 6. 0.90 ppm, t, 3H vf 7. 3.65 ppm, br, 1H 8. 7.85 ppm, d, 2H vh 9. 4.73 ppm, s, 2H 10.7.47 ppm, d, 2H QUESTION 3 Would H1 NMR be able to distinguish between the compounds below? Why or why not (Be s Click Save and Submit to save and submit. Click Save All Answers to save all answers.arrow_forwardDetermine splitting for all CHx groups using n+1 rule then match to appropriate spectrum drawing CH or OH group above each of the peaks.arrow_forward
- molecular formula: C5H9N 1. Given the molecular formula, label important peaks on the spectrum and explain how you determined the Structural Formula for your assigned compound.arrow_forwardWhich peak in a MS is used to determine the molecular formula? a b с d e f The base peak, which is the set of peaks farthest to the left. The base peak, which is the set of peaks farthest to the right. The parent ion, which is the set of peaks farthest to the left. The parent ion, which is the set of peaks farthest to the right. The parent ion, which is the tallest set of peaks on the spectrum. The base peak, which is the tallest set of peaks on the spectrum.arrow_forwardCan you help me determine the structure of the compound represented in this spectrum?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning