Chem 30A 2009 Midterm 2 Key

Chem 30A 2009 Midterm 2 Key - Chemistry 30A UCLA Fall 2009...

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Chemistry 30A UCLA Fall 2009 Midterm Exam II KEY On my honor, I have neither given nor received any aid on this exam Signature: KEY Name: KEY UCLA Student I. D. Number: Question Points --------------------------------------- 1 (28) --------------------------------------- 2 (24) --------------------------------------- 3 (15) --------------------------------------- 4 (18) --------------------------------------- 5 (20) --------------------------------------- 6 Extra Credit (5) --------------------------------------- Total
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Chemistry 30A, Fall 2009 Name: KEY Page 1 THEORY 1. A. (4) Calculate the Double Bond Equivalents (DBE) (Degree of Unsaturation) for C 12 H 18 BrClN 2 O 2 . DBE = #C – (#H + #X)/2 + (#N)/2 +1 = 12 – (18+2)/2 + 2/2 + 1 = 4 B. (4) Circle the isoprene units in abietic acid. HOOC HOOC C. (4) Define “stereospecific reaction” using words and an example. A reaction wherein the stereochemistry of the product is dependent on the stereochemistry of the starting material. For example, syn dihydroxylation of cis or trans alkenes. For example, syn hydroboration of cis or trans alkenes. D. (4) Draw the structure of the tertiary butyl cation clearly showing its geometry and label the
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Chem 30A 2009 Midterm 2 Key - Chemistry 30A UCLA Fall 2009...

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