Midterm2-Ternansky-Fall 04

Midterm2-Ternansky-Fall 04 - Chemistry 140A Fall, 2004...

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Chemistry 140A Fall, 2004 Second Midterm Exam 275 points 11/18/04 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO. ....FILL OUT THE FOLLOWING INFORMATION NOW: TA and section (where you will pick up your graded exam) TA first name: Nihls Bohr . Section number: . YOUR NAME (Print): Ima Key . SIGNATURE: . ID checker initials: . If you wish to have any answers considered for a re-grade, your exam must be completed in INK . Section Meets Room TA A01 M 9:00-9:50 Sequo 147 Joshua Kuperman A02 F 9:00-9:50 Sequo 147 Joshua Kuperman A03 W 4:00-4:50 Sequo 148 Joshua Kuperman A04 W 5:00-5:50 Sequo 148 Joshua Kuperman A05 M 4:00-4:50 Whl 2114 Joshua Kuperman A06 M 5:00-5:50 Whl 2114 Anthony Estrada A07 M 6:00-6:50 Whl 2114 Anthony Estrada A08 M 7:00-7:50 Whl 2114 Anthony Estrada A09 F 3:00-3:50 Solis 110 Aaron Wohlrab A10 F 4:00-4:50 Solis 110 Aaron Wohlrab A11 F 5:00-5:50 Solis 110 Aaron Wohlrab
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1. (2 points) Draw the bond-line formula for 2,2,5-trimethylhexane (7 points) Using the circle provided, draw the Newman projection representing the HIGHEST energy conformer of this molecule. View down the carbon-3 to carbon-4 bond (IUPAC numbering). In drawing the Newman projection, use ONLY abbreviations for the substituents. The abbreviations you use must be less than 3 letters long. For example, for the substituent "-CH 2 CH 3 " you would use the abbreviation "-Et". tBu H H iPr H H (3 points) What is the above conformation called? ECCLIPSED (6 points) Draw the Newman projection representing the LOWEST energy conformer of this molecule. View down the
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Midterm2-Ternansky-Fall 04 - Chemistry 140A Fall, 2004...

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