TT1wAns - to the resonance hybrid. N + N N N 3. ( 9 marks )...

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CHM 138H Term Test 1 (October 14 th 2009) Answer Sheet NAME: _ MODEL ANSWERS Student #: ___________________ Tutorial Gp. #: __________ Part I. ( 20 marks ) Multiple Choice Answers: Question 1 2 3 4 5 6 7 8 9 10 Answer b d b c c c c b d b Part II. Short Answers: 1. ( 12 marks ) Draw appropriate line structures to represent each of the organic molecules in Q1. (a). (b). (c). O Cl 2. ( 13 marks ) Draw the important resonance forms for the species shown in Q2. Begin by redrawing the resonance form shown below. Use one electron flow arrow on one of the structures to show how two resonance forms are related. Circle the most significant contributor
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Unformatted text preview: to the resonance hybrid. N + N N N 3. ( 9 marks ) Write the structures of the two species formed in the reaction and draw two curved arrows to represent the electron flow in the reaction. (a). CH 3 CH 2 + AlCl 4-(b). Cl Al Cl Cl Cl 4. ( 16 marks ) 2-methylhexane (a). H CH 2 CH 3 H H H CH(CH 3 ) 2 4 3 (b). H CH(CH 3 ) 2 H CH 2 CH 3 H H (c). 1 3 5 H H CH 3 CH 2 CH 3 H O HO Calculation of strain energy: -Et group axial, -Me and -COOH groups equatorial 2 x -Et -H 1,3-diaxial interactions = 2 x 4.0 kJ/mol = 8.0 kJ/mol For Markers Only: Question MC/20 Q1/12 Q2/13 Q3/9 Q4/16 Total/70 Mark...
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TT1wAns - to the resonance hybrid. N + N N N 3. ( 9 marks )...

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