FinalSummer05

FinalSummer05 - Chemistry 140A Summer, 2005 Final Exam 550...

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Chemistry 140A Summer, 2005 Final Exam 550 points 7/30/05 YOUR NAME (Print): Ima Key . SIGNATURE: . ID checker initials: . 1. (108 points) Rate the following commonly-used solvents according to their molecular properties. On the line provided, write (2 points each): PP for “Polar Protic” PA for “Polar Aprotic A for “Apolar” 4) CCl 4 H NH 2 O 3) H 2 O P O Me 2 N NMe 2 NMe 2 H 3 C O OCH 2 CH 3 10) N,N -dimethylformamide 5) acetone 9) dimethylsulfoxide 1) hexane 2) nitromethane 11) acetonitrile 6) 7) 8) 12) isopropanol A PA PP PP A PA PA PA PA PA PA PP Use the above structures to answer the following questions:
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(5 points) Name the functional group present in compound #8: ESTER (8 points) Draw the BEST Lewis dot structure for compound #2. Use dots ONLY to represent outer shell electrons, NOT to designate electrons in bonds (use straight lines for bonds): C H H H N O O (8 points) Draw the structure of compound #11 below using bond-line formula: N H 3 C C N or (5 points) How many sigma bonds are present in molecule #11? 5 (5 points) How many pi bonds are present in molecule #11? 2 (28 points) List all the compounds that have at least one sp 2 hybridized atom in its structure: 2, 5, 6, 7, 8, 9, 10 (20 points) Draw compound #10 and one resonance contributor. BOTH structures must obey the octet rule for ALL atoms. Be sure to include arrows to designate
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FinalSummer05 - Chemistry 140A Summer, 2005 Final Exam 550...

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