Chapter 12A.5, Problem 14P

The picture shows the given compound that was analyzed through mass spectra where notable peaks were observed. What are the structure of the fragments in the following M/Z.   M/Z = 91, M/Z = 43, M/Z=147

6. Relative Intensity Determine the molecular formula that goes with the following mass spectrum. Write this on the spectrum, and draw a structure that fits with this molecular formula. 100 80 69 20 m/z 51.0 52.0 53.0 9.7 6.6 3.3 77.0 18.8 78.0 7.3 79.0 8.9 89.0 7.5 104.0 7.4 105.0 3.2 106.0 72.5 107.0 5.9 140.0 32.0 141.0 100.0 142.0 8.0 143.0 31.7 144.0 2.3 tarantorpille 25 50 75 m/z 100 abou 125 [M]+ 141 amu

How to interept this data to match the structure? It gives the peak/PPM and having trouble matching it up. Does the intensity of the peak mean something? If possible, please draw it with thr associated peaks/ppm's.

Mass spectroscopic.  What is the isotopic peak pattern of each : Organic compound with 2 bromine atoms. Organic compound with 2 chlorine atoms.

Which of the following is true about the base peak in mass spectrometry? It has the largest peak height in the spectrum. It has the highest m/z value of all the peaks in the spectrum. The m/z value equals the molecular weight of the compound. The m/z value corresponds to a very stable carbanion.

Identify 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.

Label the molecular ion, the base peak, and the M + 1 peak in the mass spectrum of pentane (C5H12).

After submitting a sample for mass spectral analysis you are given the following spectrum: 100 80 - 60 40 20 – 10 20 30 40 50 60 70 80 m/z You know that your sample is either 3-pentanone or 3-pentanol. OH 3-pentanone 3-pentanol Part A: How could you use the mass spectrum above as your only means to determine if your sample is either 3-pentanone or 3- pentanol? Note that the spectrum above lacks a molecular ion. Part B: What is the identity of the sample which provided you with spectrum above: 3-pentanone or 3-pentanol? Relative Intensity

The figure below is the mass spectrum of a haloalkane B. What is the fragment for the base peak at m/z = 29? Deduce and explain the halogen present in the compound. Hence, identify compound B. Suggest why the two peaks at m/z =108 and 110 have almost the same intensity? (Relative atomic masses: F = 19.0, Cl = 35.5, Br = 79.9, I = 126.9)