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- Complete the electron-pushing mechanism for the reaction of the y-hydroxyaldehyde in hydrochloric acid by adding any missing atoms, bonds, charges, nonbonding electrons, and curved arrows. Note the use of a generic alcohol representing another alcohol molecule in solution. Step 1: draw curved arrows. Step 2: complete the structure and add curved arrows. Select Draw Rings Groups More Erase Select Draw Rings Groups More Erase R -0 : H. | H H 1LQ8. How would you distinguish the following molecules using IR and Mass Spectrometry? Please label at least two differences for IR and two for MS. Please draw the mechanism for the formation of fragments which can distinguish the two molecules via mass spectrometry. HOBocHN, Surya was leaving the lab in a hurry and forgot to note which unknown he added. From the reaction scheme below and the GC-MS. Help Surya figure out whether he added the chlorinated compound, or the brominated compound to his reaction. Label the base peak and molecular ion peak. CH, NH₂ Br or Cl ♦ Relative intensity 100- 80- 60- 40- 8 Acetonitrile Water (9:1) 6h 100 BocHN, CH₂ 150 m/z 200 TFA DCM (19) 1h 250 H₂N.
- 4. Do the retroanalysis and forward synthesis for any two. Two arro a) 7="7 LOH HOWhich one of the following statements is not true? O In mass spectrometry, the initially formed radical cation can sometimes survive and appear as a peak on the mass spe O Visible light is higher in energy than infrared light. O In mass spectrometry the peak corresponding to an ethyl cation fragment would appear at m/z 30. O In mass spectrometry, a benzylic cation would appear at m/z 91. O In IR spectroscopy, a C-O bond stretch would appear at a lower cm1 than a C=O bond stretch. %23 $ & 8 2 3 4 6 8 Q E R T. Y 4 5 2 K D G H. C || N M. altA student ran the reaction shown here separately using two different bases: once with NaOH and again with LDA. When NaOH was used, the organic product's UV-vis spectrum had a Amax of ~220 nm. When LDA was used, the product's spectrum had a max of -180 nm. In both cases, the formula of the organic product was C,H10. Explain. Br Base ? A
- Propose three different fragmentation/rearrangement mechanisms for the molecular ion of the following molecule, formed in an electron ionisation mass spectrometer's source. Clearly indicate on the fragments whether they are free radicals, carbocations or radical cations. CI- OH Instructions: Draw the mechanisms by hand using pen and paper and upload a single image (photograph) of your work into the "drag-and-drop" space below. Only an uploaded image of work done in your own handwriting will be graded.Take a look at the reaction in the first image that give two products A and B The second picture shows the DEPT 90 (TOP) and DEPT 135 (BOTTOM) of the compound that was isolated as only product of this reaction: In both spectra there are 7 signals between 120 and 140 ppm. How can you use these DEPT spectra to establish if product A or product B was formed in this reaction? Explain your reasoning.4. The following is the mass spectrum of tert-butylbenzene. a) label the molecular ion peak on the spectrum b) label the base peak on the spectrum c) draw the fragmentation of the molecular ion to produce the base peak fragmentation 100 119 80 60 40 134 20 0.0+ 0.0 40 80 120 160 m/z Rel. Intensity
- A2 drag the appropriate labels to their respective targets. BR2 , H20, H2O2,Fe2(SO4)3, HCN/KCN, H2/PD/BaSo4 , H3o+. please. make your answers clear.5. For the following molecules, draw the fragments based on the peaks listed. Consider the molecular ion and fragmentation patterns found in Ch. 13 of your lab textbook. a. m/z 162, 120, 105, 77Draw the most stable cations formed in the mass spectrometer by a cleavage of the following compound. Click and drag to start drawing a structure X 10 Ö 5