new - Name: _ CHEM116L Section 1 Mini-Test September 14,...

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Name: ________________________________ CHEM116L Section 1 Mini-Test September 14, 2005 1) A partial Lewis structure of caffeine is shown below. Draw in the nonbonding electrons to complete its Lewis structure. Then provide a resonance structure in which all of the nitrogens are sp 2 hybridized. In all cases, indicate positive or negative charges where applicable. (10 points) O C N CH 3 C C N CH 3 C N N H 3 C C O Caffeine H 2) A. Carbon monoxide, CO, has two major resonance contributors, one containing formal charges on its atoms and one with no formal charges. Provide both resonance structures below, showing all nonbonded electrons and formal charges where applicable. Then answer the question that follows. (8 points) B. Circle the structure that is most likely to react with a Lewis base such as and indicate where the Lewis base is most likely to react below. Provide a short explanation for your choice using only the space provided below. (5 points) OH
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This note was uploaded on 03/29/2012 for the course CH 318N taught by Professor Willson during the Spring '08 term at University of Texas.

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new - Name: _ CHEM116L Section 1 Mini-Test September 14,...

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