Exam%201%20answer%20key%2008Sep24

Exam%201%20answer%20key%2008Sep24 - 4:122 Exam 1 page 1 o f...

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4:122 Exam 1 (9/24/08) page 1 of 5 Name Ygf_--+ _ 1) Indicate which of these structures are likely products from the addition of 1 equivalent of DCI to cyclopentadiene by entering the word "yes" or "no" under the structure. [1 pt each] ~- . CI o-CI 0 C' b H n oD CI-t! 0 0 D H 0 No Y6 r0D 'fES y~ 2) For each structure, fill the box with the requested number (# of pi system electrons) and classification (Classify = aromatic, antiaromatic, or neither). [1 pt each box] 0 e t1V;u. ..1t- ~ 0 N H/~'H N CC) < ?0 Qa 11 pi e- t{ if 10 b G classify tvt:"\~ tJ~ ~1V\ ?fL6V\ RrQ. .61v\ 3) Part a. Draw the mechanism (i.e., steps) for addition of H+ to cyclopentadiene. Not the entire reaction justthe ~e~\~st step :hOW:OWS ': pPtS J ~+ / Ll~ Part b. Draw the resonance structures for the cation that results from part 3. [4 pts] CB 0)
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- - - - H1 _ 4:122 Exam 1 {9/24/08} page 2 of 5 Name __ 4) Draw a structure that matches the molecular orb'ltal diagram at left [3 pts each) ; - i Molecular orbital diagram ____ i
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This note was uploaded on 02/16/2010 for the course CHEM 122 taught by Professor Pienta during the Spring '08 term at University of Iowa.

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Exam%201%20answer%20key%2008Sep24 - 4:122 Exam 1 page 1 o f...

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