2000 Exam 2 Key

2000 Exam 2 Key - Name_KEY_ ID # _ ms Pnlotasreetchecd...

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

View Full Document Right Arrow Icon
Name__________________KEY__________________ Chem 2301, Fall 2000, Exam 2, Page 1 ID # ____________________________________ Please check here if you do NOT wish to have your exam returned in class. Exams not returned in class can be picked up at Professor Distefano’s office (437A Smith) during regularly scheduled office hours. Organic Chemistry 2301 Fall 2000 EXAM 2 200 Points 8 Pages plus table 1) 50 points __________________ 2) 50 points __________________ 3) 30 points __________________ 4) 40 points __________________ 5) 30 points __________________ Total 200 points __________________ Average 132 SD 32 Count 166
Background image of page 1

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

View Full DocumentRight Arrow Icon
Name__________________KEY__________________ Chem 2301, Fall 2000, Exam 2, Page 2 High 200
Background image of page 2
Name__________________KEY__________________ Chem 2301, Fall 2000, Exam 2, Page 3 1. (50 points) Consider the following S N 2 reactions. (i) Circle the FASTER reaction. (ii) Briefly explain why. (a) [10 points] Cl O + Cl Cl + CH 3 CH 2 S S + Cl Faster because sulfur is more polarizable than oxygen and hence a better nucleophile. + CH 3 CH 2 O (b) [8 points] + I + I Br I + Br Br I + Br Faster because reactant has only one beta branch and thus less steric hinderence (c) [8 points] Br + C N CN + Br Br + C N CN + Br Faster because DMSO is a polar aprotic solvent whereas H 2 O is a polar protic solvent. H 2 O solvent DMF solvent Note: H 2 O is a protic polar solvent while DMF (dimethylformamide) is an aprotic polar solvent.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Name__________________KEY__________________ Chem 2301, Fall 2000, Exam 2, Page 4 (d) [8 points] O SH + O F + SH O O F O SH + O + SH O O Faster because fluoroacetate is a better leaving group than acetate. This is because Fluoroacetic acid is
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.

Page1 / 12

2000 Exam 2 Key - Name_KEY_ ID # _ ms Pnlotasreetchecd...

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