Test II key 2012 - CHM 242 First Name Test II Pro f Shin...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

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

View Full Document Right Arrow Icon
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CHM 242 First Name Test II Pro f. Shin Last Name October 31, 2012 ID# Signature 1. Leave your ID card picture up on your desk. There are 7 pages plus a periodic table. 2. You may use the backs of pages as scratch paper, as they will not be graded. If an answer must appear on the back of a page, make a note to the grader to check the back page. 3. The answer key is accessible by Blackboard after the test. 1 /24 2 /36 3 /40 TOTAL / 100 La. Give the mechanism and product(s) for the reaction below. Show stereocI-zemistry. (12 pts) EtOH, smail amount of H2804 6M Problem 1 continued on next page. Lb. The reactant below is the same as in probiem 1.a. Give the mechanism and product(s) for the reaction below. Show stereochemistry. (12 pts) HCEC' K+ acetone 5 U 2' 2.a. Give the mechanism and product(s) for the two—part reaction below: note that there is the first reaction with reagents above the arrow, followed by a second reaction below the arrow. Show stereochemistry. (22 pts) ' Start by drawing the reactant in the 8 configuration, and show your prioritization. (6 pts) 0 C. 1) \ II D + CI—S oi b i x I! H+Et fl 0 :3 OH ) NH3, DMF Problem 2 continued on next page. 5 2.b. In the reaction in problem 2.21., you needed to perform two reactions to get your final product(s). If you did not perform the first reaction (reagents above the arrow), would you get the same product(s) or something different? Explain your answer. (8 pts) (Um/«M c605 w‘dwfim MW %/ 41PM cud/Wt WW €12.62,de WM WM OLWOJ‘Q H“ 1‘2; N143 (/QDMF (00mm? W W M“ I) 3. A student was trying to determine whether the reaction below went by 8N1 or 8N2 mechanism. Et t_Bu H + Na+ 'CN m—m—u» H Q. She decreased t increased the C 6m | concentration of substrate by half: the reaction rate was half as fast. She centration of NaCN by two-fold: the reaction rate remained the same. 3.a. Give th mechanism and product(s) of the reaction. Show stereochemistry. (14 pts) ei— Problem 3 continued on next page. 7 Sb. For your product(s) in 3a, did you give more than one product molecule? If so, was there a major product? Why was there a major product? Briefly explain. (10 pts) Ail [2) ”W7“ WWW C+ oéherQ/fla/t/lex m tor/DQWme/e W‘LWWW [3+ ,5. 1&5“; xii/50, #W W W /W'WW 3.c. How are your product molecule(s) in 3.21. related? (4 pts) 2m 0? mm 3.d. Draw the energy diagram for your mechanism in problem 3.a. Show any differences in energetics of the molecules you present in your mechanism. Label ”reactants," "products,” and any ”intermediates" and "transition states" cofistent with your mechanism. (12 pts) 75‘ (,0 NW W Ea lbw { S ’3‘ Energy Reaction Coordinate ...
View Full 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