MassSpecWorkshopkey

MassSpecWorkshopkey - molecular ion peak? Answer: 152 (vii)...

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Exercises on Mass Spectra - Key Complete the following exercises. Turn in the completed questions to your TA. THIS IS AN INDIVIDUAL EXERCISE (NOT GROUP WORK). Mass spectrum of isooctane CH 3 C H 3 CH 3 CH 3 C H 3 NAME: __________KEY__________ Answer the following questions based on the isooctane mass spectrum: (i) Which signal on the mass spectrum corresponds to the base peak? Answer: 57 (ii) Which signal on the mass spectrum correspond to the molecular ion peak? Answer: NONE (iii) Is there an isotope effect based on the mass spectrum? If yes, write down the m/z value that corresponds to the isotope effect. Answer: No (iv) Draw the molecular mass fragments for the following m/z ratios. Show all the atoms (including) all the hydrogens clearly. m/z = 41 m/z= 57
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H C C CH 2 3 + + C CH 3 CH 3 H C 3 Mass Spectrum of p -Anisic acid O OH O C H 3 NAME: ___________KEY___________ Answer the following questions based on the p-Anisic acid mass spectrum: (v) Which signal on the mass spectrum corresponds to the base peak? Answer: 135 (vi) Which signal on the mass spectrum correspond to the
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Unformatted text preview: molecular ion peak? Answer: 152 (vii) Is there an isotope effect based on the mass spectrum? If yes, write down the m/z value that corresponds to the isotope effect. Answer: Yes (viii) Draw the molecular mass fragments for the following m/z ratios. Show all the atoms (including) all the hydrogens clearly. m/z = 135 O CH 3 C O + Mass Spectrum of 2-methylphenol OH CH 3 NAME: ________KEY_________ Answer the following questions based on the 2-methylphenol mass spectrum: (ix) Which signal on the mass spectrum corresponds to the base peak? Answer: 108 (x) Which signal on the mass spectrum correspond to the molecular ion peak? Answer: 108 (xi) Is there an isotope effect based on the mass spectrum? If yes, write down the m/z value that corresponds to the isotope effect. Answer: Yes (xii) Draw the molecular mass fragments for the following m/z ratios. Show all the atoms (including) all the hydrogens clearly. m/z = 79 C C CH 3 H C C C H H H +...
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MassSpecWorkshopkey - molecular ion peak? Answer: 152 (vii)...

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