quiz 1 answer key (3) - not Csp2-Csp2 bonds. (4 points) CH...

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CHEM 236 Quiz 1 8:00 am NAME 1) What is the hybridization state on the indicated atoms? (5 points) H H H H H 3 C O O CH 3 H 3 C N O CH 3 CH 3 N C H 2) Provide a curved arrow mechanism and a product structure for the following transformation: (3 poin Draw a reaction coordinate diagram and indicate the position of the reactants, the product and intermediates you drew: (4 points) Energy Reaction Progress sp3 sp2 sp3 sp s KEY CH 3 H 3 C CH 3 H Br 2-bromo-2-methylpentane CH 3 H 3 C CH 3 H Br CH 3 H 3 C CH 3 Br CH 3 H 3 C CH 3 Br CH 3 H 3 C CH 3 Br 1 2 3 3 2 1
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The following reaction is best described as a ________________________ acid/base reaction. (1 po H 2 SO 4 + NEt 3 HSO 4 + HNEt 3 Draw two resonance structures of the sulfate anion and the curved arrows to convert between them. (3 points) 4) Use molecular orbitals to describe why there is free rotation between Csp3-Csp3 bonds but
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Unformatted text preview: not Csp2-Csp2 bonds. (4 points) CH 3 H 3 C CH 3 H 3 C CH 3 H 3 C CH 3 H 3 C x Bronsted-Lowry S O O OH O S O O OH O CH 3 H 3 C CH 3 H 3 C CH 3 H 3 C CH 3 H 3 C The sp3 orbitals combine head on to form a sigma bond, therefore rotation does not disturb the overlap and consequential bond formation The same is true for the sp3 orbitals in this system, but in addition there are two p-orbitals next to each other which form a pi bond side on. When one is twisted out of the plane, overlap is lost and the pi bond is broken. Good overlap No overlap, bond broken. x...
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This note was uploaded on 12/30/2011 for the course CHEM 236 taught by Professor Baranger during the Spring '08 term at University of Illinois at Urbana–Champaign.

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quiz 1 answer key (3) - not Csp2-Csp2 bonds. (4 points) CH...

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