Use a sheet of paper to answer the following question. Take a picture of your answers and attach to this assignment. In the mass spectrum of 2-hexanone, two significant fragments are formed one with m/z = 58 and one with m/z = 43. Suggest possible structures for these fragments.
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- The mass spectrum of the following compound shows fragments at m/z= 127, 113, and 85. Propose structures for the ions that give rise to thesepeaks.d. dipôle moments between atoms. The mass spectrum of CH3F is given in the chart below. (a) Draw a likely structure for the molecular ion (m/z 34). (b) Assign structural formulas to the two other high abundance peaks (m/z 33 and m/z 15) in the spectrum. (c) Propose an explanation for the low abundance of the peak at m/z 19. Relative lon Abundance 100 80 60 40 20 _________g 10 15 MW: (g/mol) C=12 H₂= 3 F: 19 20 25 miz 30 35UV: max 235 (ε 12,000) and max 314 (ε 120) EIMS: m/z 39 (31%), 41 (33%), 55 (37%), 69 (26%), 98 (100%), 99 (7%), 100 (0.2%) IR: Imm IR spectrum in CCl4 solvent 2950 cm-¹ 2000 4) RC=N 5) 0-H BAYEHUNIERI - R 1630 cm-¹ 1710 cm-¹ $10 4a) Which of the following heteroatoms that are definitely NOT present based on the EIMS data? (Circle all that apply). Br Cl FSI 0 4 continued) Please refer to data on preceding page. 4b) From the EIMS data what is the best estimate of the number of carbon atoms in this molecule? 4c) From the UV data, conjugated л-bonds are: definitely present definitely absent 4d) From the IR spectrum alone, which of the following functional groups can be definitely ruled OUT? Circle those that are ruled out and briefly explain why. 1) C=0 2) RC=CR 3) C=C cannot tell
- The following is the mass spectrum of compound C, C,H,O. Compound C is infinitely soluble in water, undergoes reaction with sodium metal with the evolution of a gas, and undergoes reaction with thionyl chloride to give a water-insoluble chloroalkarne. Propose a structural formula for compound C and write equations for each of its reactions. 100 31 80 60 40 20 M (60) 10 20 30 40 m/z 50 60 70 80 Relative AbundanceWrite the molecular formula that is consistent with the following mass spectral data (e.g. C4H10). Leave no blank spaces. M*• at m/z = 84, relative height 10.0% %3D (M+1)*• at m/z = 85, relative height = 0.56% %3DThe leaves of the Brazilian Tree Senna multijunga contain a number of pryidine alkaloids that inhibit acetylcholinterinase. Two recentyl isolated isomeric compounds have the strcture have the strcture shown below. (NOTE: M=293) Use the mass spectral data provided to determine the precise location of the hydroxyl group in each isomer. Isomer A: EI-MS, m/z(rel. int): 222(20), 150(10), 136(25), 123(100) Isomer B:EI-MS, m/z(re;. int): 236(20), 150(10), 136(25), 123(100)
- Analysis of a sweet-smelling, neutral compound of carbon, hydrogen and oxygen produced the following results: %C = 54.5; %H = 9.1. From its mass spectrum, the molecular ion had a mass/charge ratio of 88. Its infra-red spectrum showed a prominent peak at 1735 cm–1. Figure below shows the NMR spectrum of the compound. Which of the following is this compound? A. 3-hydroxybutanalB. Methyl propionateC. Ethyl acetateD. 2-methylpropanoic acidE. MethoxyacetoneAnnotate the Mass Spec, 1H NMR, and 13C NMR for C4H11N or Butylamine Annotate the Mass Spec, 1H NMR, and 13C NMR for C4H8O or Butraldehyde Annotate the Mass Spec, 1H NMR, and 13C NMR for C5H8O or Cyclopentanone Thanks :)3. The mass spectrum of 2-methyl-3-pentanol is shown below. What fragments can you identify? 80- 60 L 40 20 0 10 20 100 40 60 qule m/2 80 OH CH³CHCHCH₂CH3 CH3 100 120 140
- Which of the following molecules matches the given data? HDI = 5 IR (cm-1 ): 1724 (strong), 1604 (weak) UV-Vis: 283 nm ( benzene = 255 nm)Using the mass spectrum of 1-bromobutane. Propose a structural formula for the cation of m/z 29.Dark green Na3[Co(CO3)3]⋅3H2O is suspended in water and en.2HCl is added and the mixture heated, with a colour change and evolution of a gas. “en” = ethane-1,2-diamine, H2NCH2CH2NH2 The reaction is cooled and a cobalt-containing solid is obtained as the product. Microanalysis results were C: 21.84%; H: 5.9%; N: 20.42%. What is the molar ratio of C:N in the product?