Chemistry 2OA3Fall2010Ch05TG Afterclasses

Chemistry 2OA3Fall2010Ch05TG Afterclasses - Advice • No...

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Unformatted text preview: Advice • No 90 o angles in chairs • Don’t mix bondline and full format • Resonance: Do not create new charges if one already exists • Which is the better base? Alkoxide or Carbanion? • READ AND ANSWER the question asked 1 Advice • Website for NMR pratice: http://www.chem.ucla.edu/~webspectra/ • Website for other practice: http://www2.chemistry.msu.edu/faculty/reusc h/VirtTxtJml/intro1.htm • DO NOT EMAIL ME from AVENUE!! I can’t reply! 2 PRACTICE PRACTICE PRACTICE PRACTICE PRACTICE PRACTICE PRACTICE 3 Molecules with more than one chiral center • The maximum number of possible stereoisomers will not exceed 2 n , where n is the number of tetrahedral stereogenic centers (i.e. chiral carbons) (draw in the bromines and hydrogens, and assign R and S) 4 How are the following related? Note: Max 4 stereoisomers (2 n ) • 1 and 2 as well as 3 and 4 are enantiomers and these could only be separated from each other using chiral techniques (ex: a chiral chromatography column) • 1 and 3 (plus 1 and 4, or 2 and 4, or 2 and 3) are...
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This note was uploaded on 01/30/2011 for the course CHEM 2OA3 taught by Professor Stover during the Spring '10 term at McMaster University.

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Chemistry 2OA3Fall2010Ch05TG Afterclasses - Advice • No...

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