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- Which compound correlates to the following mass spectrum? 100 80 20 50 75 100 125 150 m/z Relative htensityA compound gives a mass spectrum with essentially only three peaks at m/z = 77 (40%), 112 (100%), and 114 (33%). Identify the compound.Which functional group is consistent with the IR spectrum below? 100 TURKSHETTRICE 4300 wwwm + 3000 Ketone Carboxylic acid Ether Alcohol PRVEMBERI 2000 1500 1000 $30
- The following is a mass spectrum of octane. 100 Relative Intensity 80 60 40 20 0 10 20 30 40 50 60 x Incorrect. m/z 70 80 90 100 110 Which peak represents the molecular ion? The molecular ion peak is expected to appear at m/z = amu.The mass spectrum for acetophenone is shown below. a) Where does the molecular ion show up? ?) b) Which peak is the base peak? ? 1) The mass spectrum for acetophenone is shown below. Relative Intensity 100- 80- 20- acetophenone 0-tyttim 20 10 30 40 50 60 77 trommlilily 70 m/z 80 90 100 105 Ć 110 120 120 a) Where does the molecular ion show up? (m/z = ?) b) Which peak is the base peak? (m/z = ?) c) Draw the structure of the charged species responsible for the peak at m/z = 120. d) Draw the structure of the charged species responsible for the peak at m/z = 105. e) Draw the structure of the charged species responsible for the peak at m/z = 77.Consider the mass spectrum below. 100 80- 60- 20 0.0- 0.0 60 100 miz SDBS, National Institute of Advanced Industrial Science and Technology Which peak is the molecular ion? Choose one OA OB OD. OG
- 1. The two mass spectra below correspond to two isomers of CHO: 3-methyl-2-butanone and 3- pentanone. Draw the two structures. Match the spectrum with the compound and draw the fragment ion that corresponds to the base peak. a) 20 10 20 40 50 70 30 m/: b) 200 20 10 20 30 40 m/z Relative ntensity Relative nterstyThe base peak in the mass spectrum of propanone (acetone) occurs at m/z 43. What cation does this peak represent?The mass spectrum of an alcohol (C5H12O) exhibits a base peak at m/z =59. Is the alcohol most likely pentan-1-ol, pentan-2-ol, or pentan-3-ol? Explain.
- Identify an unknown compound with the following mass spectrum data: M* at m/z of 106, intensity of 82.0 (M+1)* at m/z of 107, intensity of 4.5 (M+2)* at m/z of 108, intensity of 25.9 O CSH11C O CH3Br O C3H7C1 C2H5Br O C2H5CIConsider isomeric alcohols A and B and mass spectra [1] and [2]. (a) Label the molecular ion and base peak in each spectrum. (b) Use thefragmentation patterns to determine which mass spectrum correspondsto isomer A and which corresponds to isomer B.The mass spectrum of Compound D, with a molecular formula C8H7BrO2 is shown below. Draw the most likely ion fragment for the signals at m/z 155, 157, 183, and 185
