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- 2 (a) In the following reaction, PCC A (i) Draw the structure of compound A. (ii) Explain using the IR spectra to confirm that the reaction is completed. (iii) Identify the molecular ion peak for compound A. (iv) Fragmentation of A shows a peak at m/z 111. Draw the possible cation for this peak. (v) Determine the resonance structure of this cation.II B. 1 for the chain propagating steps refer to the first imageQ.7.
- I don't undertaand how you calculated the final ratio of H(2)O at the end of the explaination. How did you come to 6?2 (a) In the following reaction, OH РСС A (i) Draw the structure of compound A. (ii) Explain using the IR spectra to confirm that the reaction is completed. (iii) Identify the molecular ion peak for compound A. (iv) Fragmentation of A shows a peak at m/z 111. Draw the possible cation for this peak. (v) Determine the resonance structure of this cation.7. a) A) In the box below the arrow, label if the pericyclic reaction is a Diels Alder (DA), Electrocyclic (EC) or Sigmatropic Rearrangement (SR). B) Determine the major product(s). heat HO₂C b) heat to c) + 1. Na, NH3 NO2 NO2 2. heat
- When n-butylbenzene is ionized by electron-impact ionization in a mass spectrometer, radical cation D initially forms as the molecular ion. It then readily fragments. Which of the following fragments would likely be present in the highest abundance in this mass spectrum relative to the others shown? D (A) (B) (D)2. (10 points) Complete the reaction scheme below. Show all reagents and intermediates. No reaction is a possible answer. 1) CH;CH,MgBr CH,OH H+ (excess) но 2) H,O*, H20 в A OCH3what makes aromatic and aliphatic ethers different from each other in mass spectrometry
- 1. An aliphatic ketone absorbs at 1,715 cm-1. What is the frequency of this vibration in hertz, which is cycles per second or just per second, reciprocal seconds? 2. What is the energy equivalent of this stretching vibration in kcal/mole? 3. Why does 3,4-diethyl-3-hexene not have a carbon to carbon double bond stretching absorption band? 4. Why does a carbon to oxygen double bond absorption band have a greater intensity than a carbon to carbon double bond absorption band? 5. Using only IR, explain in detail how one could most easily differentiate between oct-1-ene and oct-1-yne if all carbon to carbon bonds are ignored. 6. Using only IR, explain in detail how one could most easily differentiate between butan-1-ol and butanoic acid.Draw the product formed when the structure shown below undergoes substitution with OH. Interactive 3D display mode ÇH, H Brl Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. Show the appropriate stereochemistry by choosing the dashed or wedged buttons and then clicking a bond on the canvas. O O ® H: EXP. -(7)- %3D H. CAccount for the formation of the base peaks in these mass spectra. Q.) Isobutylmethylamine, m/z 44
