Organic Chemistry (6th Edition)
6th Edition
ISBN: 9781260119107
Author: Janice Gorzynski Smith
Publisher: McGraw Hill Education
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Label the molecular ion, the base peak, and the M + 1 peak in the mass spectrum of pentane (C5H12).
The M+ peak for an alcohol in the mass spectrum is 74. Find the structure of the alcohol.
Mass spectroscopic.
What is the isotopic peak pattern of each :
Organic compound with 2 bromine atoms.
Organic compound with 2 chlorine atoms.
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- 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.arrow_forwardFollowing is the mass spectrum of bromocyclopentane. The molecular ion m/z 148 is of such low intensity that it does not appear in this spectrum. Assign structural formulas for the cations of m/z 69 and 41.arrow_forwardWrite molecular formulas for compounds that show the following molecular ions in their high-resolution mass spectra, assuming that C, H, N, and O might be present. The exact atomic masses are: 1.007 83 (1H), 12.000 00 (12C), 14.003 07 (14N), 15.994 91 (16O). (a) M+=98.0844 (b) M+=123.0320arrow_forward
- The base peak in the mass spectrum of propanone (acetone) occurs at m/z 43. What cation does this peak represent?arrow_forwardThe 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_forwardWhich of the following compounds appears in the mass spectrum to have a baseline peak at m/z=43, indicating the reason OH B OH OH C Darrow_forward
- Label base peak and molecular ion peak C4H10Oarrow_forwardBelow is the mass spectrum of p-chlorotoluene Identify which peak belongs to the M+ peak/s.arrow_forwardA compound gives a mass spectrum with essentially only three peaks at m/z = 77 (40%), 112 (100%), and 114 (33%). Identify the compound.arrow_forward
- In the mass spectrum of an unknown organic compound, the molecular ion had a relative abundance of 20.9 while the M+1 had a relative abundance of 1.2. Estimate the number of carbons in the molecule.arrow_forwardHow many carbon atoms are present in a molecule which gives an M+1 peak that is 11.48% of the intensity of the molecular ion? Please explain.arrow_forwardIdentify the hydrocarbon that has a molecular ion with an m/z value of 128, a base peak with an m/z value of 43, and significant peaks with m/z values of 57, 71, and 85.arrow_forward
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