The IR spectrum shows that there are no O-H or C=O groups present. (10 points) Identify the unknown compound that shows the following spectral data. IR shows the O-H C-13 shows CH3 at 15, CH2 at 30, 4 different aryl between 115 and 150 H-1 NMR shows CH3 at 1.2, CH2 at 2.6, aryl H at 6.7 and 7.1ħ. The IR spectrum shows a strong broad peak at 3300 cm-1. The Six Peaks problem is a slight variation on Four Peaks where. (10 points) Identify the unknown compound that shows the following spectral data.Ĭorrelate each of the spectral features below with a structural feature in your final compound. We use knowledge of the structure to guide a randomized search through the. (20 points) Write synthetic sequences that show how you would prepare the following compounds.ī) starting from any alcohols with three or fewer carbonsĦ. (15 pts) Complete each of the following reactions by adding the expected major product.ĥ. (10 pts) Write a complete mechanism for the reaction shown below, including all steps and all resonance forms for any intermediates.
ortho has 3 peaks, meta has 4 peaks, para has 2 peaksī) The mass spectrum of benzyl alcohol shows peaks at m/z = 108, 91, and 77.Ĭ) Use electron-pushing arrows to illustrate the Simmons-Smith reaction ofĭ) Show the ring-closing metathesis reaction of 1,6-heptadiene.ģ. We have broad experience in the determination of structural issues related to foundation movement. (20 pts) Give brief but complete answers for each of the following.Ī) Explain how you could use C-13 NMR to distinguish the ortho, meta, and para isomers of the dichlorobenzenes. We specialize in forensic engineering and structural design. (15 points) Write complete names for each of the followingĭ) vinyl magnesium iodide or ethenyl magnesium iodideĮ) (1S,3R)-4,4-dimethyl-1,3-cyclopentanediolĢ.
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