quiz_5 - 3 group? A.) 2H, 3.42 ppm B.) 2H, 1.50 ppm C.) 3H,...

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CHM 257 Friday, November 18, 2011 20 pts. Quiz #5 Name__________________________ TA____________________________ Recitation_______________________ Page 1 2. (4 pts.) Draw the products that form in the following reactions. 1. (4 pts.) Name the following molecules. a) b) O H O O HCl + OH (two equivalents) O H MgI + H O NH 2 + HCl 3. (2 pts.) In the mechanism of the formation of an acetal from cyclohexanone, a hemi-acetal is formed as an intermediate. Draw this mechanistic intermediate in the reaction below. O O hemi-acetal
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Page 2 CHM 257 Friday, November 18, 2011 20 pts. Quiz #5 Name__________________________ TA____________________________ Recitation_______________________ 6. (6 pts.) Use the 1 H NMR spectrum for ethyl chloride to answer the following four questions. A.) Singlet B.) Doublet C.) Triplet D.) Quartet 0 1 2 3 4 PPM Cl 1.5 1 What is the splitting pattern that is observed for the CH 3 group? What is the integration and chemical shift of the CH
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Unformatted text preview: 3 group? A.) 2H, 3.42 ppm B.) 2H, 1.50 ppm C.) 3H, 3.42 ppm D.) 3H, 1.50 ppm 5. (2 pts.) How many resonance signals are observed in the 1 H NMR spectrum of 2-methyl butane? A.) Three B.) Four C.) Five D.) Six 4. (2 pts.) Which of the following statements is true about NMR? A.) Hydrogen atoms can be shielded or deshielded by their local environment. B.) The chemical shift is determined by the n + 1 rule, where n is the number of hydrogens. C.) The integration ratio is calculated using the substitution test. D.) None of the above. A.) Singlet B.) Doublet C.) Triplet D.) Quartet What is the splitting pattern that is observed for the CH 2 group? What is the integration and chemical shift of the CH 2 group? A.) 2H, 3.42 ppm B.) 2H, 1.50 ppm C.) 3H, 3.42 ppm D.) 3H, 1.50 ppm...
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quiz_5 - 3 group? A.) 2H, 3.42 ppm B.) 2H, 1.50 ppm C.) 3H,...

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