04Exam1_q

04Exam1_q - CHEMISTRY 35 Spring 2004 FIRST EXAM SIS # _...

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CHEMISTRY 35 – Spring 2004 – FIRST EXAM SIS # ________________ NAME___________________________ 1. (16 points) Draw the important resonance structures that contribute to the resonance hybrids of the following molecules. If there is more than one important resonance structure, indicate which is (are) major and which is (are) minor contributors . PROVIDE the correct formal charge for any charged atom in each resonance structure. A. B. C. D. If the C=O group of the amino ketone in part A is replaced by a CH 2 group, does the C–N bond length decrease, stay the same or increase? Briefly explain your anwer. N O B O N
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CHEMISTRY 35 – Spring 2004 – FIRST EXAM SIS # ________________ NAME___________________________ 2. (17 points) (A) Draw an energy versus dihedral angle diagram for rotation about the C2 – C3 bond of 2-methylbutane. Use C1 and C4 to define the dihedral angle for your plot. (B) For each energy maximum and each energy minimum,
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This note was uploaded on 05/17/2008 for the course CHEM 0350 taught by Professor Suggs during the Spring '08 term at Brown.

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04Exam1_q - CHEMISTRY 35 Spring 2004 FIRST EXAM SIS # _...

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