Quiz 2 - peak intensities are(10 points 1 2 3 4 5 6 7 8...

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Chem 41b Quiz 2 Grubbs/Stoltz, Winter 2011 January 21, 2011 DUE: October 24, 2011 at 9 am You have 30 min to take this quiz. It is closed note, closed book, and no collaboration is allowed. Please do not discuss the quiz with anyone until you receive it back graded. Place a box around your answers. There is no partial credit. Name______________________________________
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Chem 41b Quiz 2 Grubbs/Stoltz, Winter 2011 January 21, 2011 DUE: October 24, 2011 at 9 am You have 30 min to take this quiz. It is closed note, closed book, and no collaboration is allowed. Please do not discuss the quiz with anyone until you receive it back graded. Place a box around your answers. There is no partial credit. 1. Draw a 1 H-NMR spectrum comprised of an equimolar mixture of Si(CH 3 ) 4 , CH 3 Cl, CHCl 3 , and CH 3 I. Label the spectrum showing which peak(s) are associated with each compound and what the relative intensity of each peak is (peak area). The exact chemical shifts are not critical, but the relative chemical shifts and
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Unformatted text preview: peak intensities are. (10 points) 1 2 3 4 5 6 7 8 9 (CH 3 ) 4 Si (12H) CHCl 3 (1H) CH 3 Cl (3H) CH 3 I (3H) 2. The spectrum below is of a compound that has a molecular formula of C 5 H 8 O 2 . Unfortunately, your friend who collected the spectrum did not label it with a structure, nor use the integration tool. Based on what you know about splitting patters, identify the structure of compound of interest and label each peak with the correct relative peak area. (10 points) O O 1 2 3 4 5 6 7 8 PPM Bonus (5 points) Your same friend apparently did some reactions to the sample from problem 2. While her notebook is a mess, the spectra of the product are beautiful (see below). From what you can piece together, she treated the sample from problem 2 with Br 2 in one step, then strong base in another. The spectra have a post-it note attached that says: 1 2 3 4 5 6 PPM 20 40 60 80 100 120 140 160 180 PPM What is the identity of this compound? O O Br...
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