CHEM 239 exam_answers_Exam_2_Answers

CHEM 239 exam_answers_Exam_2_Answers - Page...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Page 1_______2_______3_______4_______5_______TOTAL________/100 CHEM 237, FALL 2007 HOUR EXAM 2 Name________________________________________________________ TA Name (1 pt)___________________ __& Section # (1pt)_____________ Student #______________________________________________________ **DO NOT TURN IN YOUR EXAM UNTIL THE END OF THE PERIOD. IT IS DISRUPTIVE TO THOSE WHO AREN’T YET DONE** 1. (8 pts) Label the following structures as cis or trans . Draw a circle around the most stable compound and a square around the least stable compound. 2. (10 pts.) Draw ALL the tribromocyclopropane isomers. trans cis cis cis trans trans CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 3. (10pts) Sketch curves on the graph below showing the energy changes that arise from rotation about the C2-C3 bond of 2,3-dimethylbutane. You need not concern yourself with actual numerical values of the energy changes, but you should label all maxima and minima on the Newman skeletons provided with appropriate -CH 3 or -H groups (for simplicity, and so that the drawings are not so crowed, represent the methyls as unlabeled “sticks”, and just draw the Hs).
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern