chem236-2009fa-hex4 - Fall 2009 Chemistry 236 Hour Exam 4...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 236 Hour Exam 4 Fall 2009 Last Name _______________________________ First Name _______________________________ 1. _______ 20 pts 2. _______ 12 pts 3. _______ 36 pts 4. _______ 10 pts 5. _______ 10 pts Total: __________ 100 pts 6. _______ 15 pts
Background image of page 1

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

View Full DocumentRight Arrow Icon
1. A compound whose 1 H NMR spectrum is shown below has the molecular formula C 5 H 10 O 2 a. (5 points) Calculate the degrees of unsaturation - show your work. b. (5 points) Given the NMR above, the degrees of unsaturation that you calculated, and that the 13 C NMR shows peaks at ! 146.1, 110.8, 71.1, and 29.4 ppm, propose a structure.
Background image of page 2
3 c. (10 points) For the three resonances between ! 5-6 ppm, show tree diagrams that explain the splitting patterns. Label protons on your structure, the NMR spectrum and the coupling constants on your tree diagrams (e.g., H a , H b , H c , J ab , etc.)
Background image of page 3

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

View Full DocumentRight Arrow Icon
c. NOT an aromatic compound: d. The chemical shift of a particular nucleus would NOT depend upon: e. An example of a [6]annulene: none of these 4 local
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/07/2011 for the course CHEM 236 taught by Professor Silverman during the Fall '08 term at University of Illinois, Urbana Champaign.

Page1 / 7

chem236-2009fa-hex4 - Fall 2009 Chemistry 236 Hour Exam 4...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online