Organic Chemistry (6th Edition)
6th Edition
ISBN: 9781260119107
Author: Janice Gorzynski Smith
Publisher: McGraw Hill Education
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Chapter 12A.3, Problem 8P
The mass spectrum of 2, 3-dimethylpentane also shows peaks at
possible structures for the ions that give rise to these peaks.
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The mass spectrum of 2,3-dimethylpentane shows peaks at m/z = 57 and 43. Propose possible structures for the ions that give rise to these peaks
The mass spectrum of 2,3-dimethylpentane [(CH3)2CHCH(CH3)CH2CH3]shows fragments at m/z = 85 and 71. Propose possible structures for theions that give rise to these peaks.
Butanal and methylpropanal give slightly different mass spectra. Both give a molecular ion peak at m/z = 72, but butanal gives four other peaks whereas methylpropanal only gives three.
State the species responsible for the four other peaks in the mass spectrum of butanal and write equations to show their formation from the molecular ion.
Chapter 12A Solutions
Organic Chemistry (6th Edition)
Ch. 12A.1 - What is the mass of the molecular ion formed from...Ch. 12A.1 - Prob. 3PCh. 12A.2 - Prob. 6PCh. 12A.2 - What molecular ions would you expect for the...Ch. 12A.3 - The mass spectrum of 2,3-dimethylpentane also...Ch. 12A.3 - The base peak in the mass spectrum of 2, 2,...Ch. 12A - Problem-13.24 The mass spectrum of the following...Ch. 12A - Prob. 16PCh. 12A - Which compound gives a molecular ion at m/z= 122,...Ch. 12A - Propose two molecular formulas for each molecular...
Ch. 12A - Propose four possible structures for a hydrocarbon...Ch. 12A - Problem-13.29 What is the molecular formula for...Ch. 12A - Problem-13.30 Propose a molecular formula for rose...Ch. 12A - 13.31 Match each structure to its mass spectrum
Ch. 12A - 13.32 Propose two possible structures for a...
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- The mass spectrum (a) and the infrared spectrum (b) of an unknown hydrocarbon are shown. Propose as many structures as you can.arrow_forwardThe mass spectrum and 13C NMR spectrum of a hydrocarbon are shown. Propose a structure for this hydrocarbon, and explain the spectral data.arrow_forwardThe mass spectrum (a) and the infrared spectrum (b) of another unknown hydrocarbon are shown. Propose as many structures as you can.arrow_forward
- 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/.)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_forwardPropose 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+=84arrow_forward
- Following are infrared spectra of nonane and 1-hexanol. Assign each compound its correct spectrum.arrow_forwardThe infrared spectrum of the compound with the mass spectrum shown below has a medium-intensity peak at about 1650 cm-1. There is also a C-H out-of-plane bending peak near 880 cm-1. Propose a structure consistent with the data.arrow_forward3b. 2-Methylhexane shows an intense peak in the mass spectrum at m/z = 85, 57 and 43. Propose the possible structures for these fragments.arrow_forward
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