18. The mass spectrum of 2-methylpentan-3-ol is shown below. Draw the structure of the fragment ions of m/z= 73 and...
The mass spectrum of 2,6-dimethylheptan-4-ol is shown in appendix A. a) Draw the structure of this compound. b) Propose structures for the fragments at m/z 87, 111 and 126. 100 80 60 abundance 40 87 20 111 126 0 10 III 100'110' 120' 130 140 150 160 20 30 40 50 60 70 80 90 m/z.
Name: Starting with the mass spectrum of n-heptane What is the molecular ion? What fragment is lost to generate the ion with m/z =71? What cation does the peak at m/z = 43 represent? What group does the spacing between each set of ions represent? Why is the peak at (M-15), corresponding to loss of -CH3 so small? Draw the structure of 2,4-dimethylpentane What is the structure of the ion responsible for m/z = 85? Relative Intensity What is the...
2. Draw the structure of the cation responsible for the base peak (m/z=58) in the mass spectrum of 3-aminopentane shown below: 3. Below is given the mass spectrum of a simple alkane. What is the chemical formula of the alkane? What is the name of the alkane? Explain how you determined the exact structure of the alkane from the observed fragments. 4. Below is a mass spectrum of an ester. Identify the ester. Consider that the dominant fragmentation pathway involves...
5. Draw a structure for and name a compound that is consistent with compound that is consistent with the following MS. abundance 73 M 80 90 100 110 120 130 140 150 160 10 20 30 40 50 60 70 m/z Question 5: Structure and name: Mass Spectrum (include the molecular ion) Observed Fragment & MW Expected MW Fragmentation type Explanation:
Draw the mass spectrum for Vinyl Acetate: C4H6O2 a. Draw out the structure. b. Label the molecular ion peak and base peak. C. Assign structures to the fragment ion peaks at m/e 43, m/e 28 and m/e 15. 100 (43-Base Peak Relative Intensity 20 28 15 86 Mt TTT 20 60 100 120 160 140 mle
zene, C6H6? 12-23 Propose structures for compounds that fit the following data: al A ketone with M+ 86 and fragments at m/z 71 and m/z 43 h An alcohol with M+ = 88 and fragments at m/z 73, m/z 70, and m/z = 59 12-24 2-Methylpentane (C6H14) has the mass spectrum shown. Which peak represents M+? Which is the base peak? Propose structures for frag- ment ions of m/z 71, 57, 43, and 29. Why does the base peak have...
11. The mass spectrum below is that of benzyl 3-methylbutanoate (see structure below). Provide a structure for the fragments at m/z 144, 129, 116, 115, 101, 99, 73, 71 and 43 (You must show the fragmentation pattern) (0.5x84 pts) 100 43 80 71 115 60 99 40 101 88 144 116 20 125 100 75 50 25 m/z 11. The mass spectrum below is that of benzyl 3-methylbutanoate (see structure below). Provide a structure for the fragments at m/z 144,...
1. Give the fragment at m/z 42 in the mass spectrum of propan-1-ol. a) CH3CH=CH2+ b) CH3CH=CH2• c) CH3CH=CH2— d) CH3CH=CH2 2. Identify a possibility for a fragment at m/z 43 in the mass spectrum. a) CH3CH2CH2+ b) CH3CH2CH3+ c) CH2=C=CH2+ d) CH3CH=CH2+
Deduce the ester compound structure with M/Z=136 on this mass spectrum; significant peaks at 51, 77, 105, 136. Relative Abundance M(136) 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 mz
The diagram shown below represents the mass spectrum (MS data) for which of the following compounds? 100 31 80 29 32 60 relative abundance 40 20 0 15 .. 10 20 30 mass/charge ratio (m/z) 0 40 CH3OH CH3CH3 CH3NH2 OCH3CH2NH2 CH3CH2OH