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Unformatted text preview: 1. carbonyl (C=O) stretch 2. OH stretch 3. aromatic or vinyl H stretch 4. aliphatic H stretch 5. vinyl (C=C) stretch View Feedback Question 3 1 / 1 point A certain very polar amino acid has an Rf = 0.3 when eluted with pure hexanes (a non-polar solvent) on silica gel. If the same amino acid is chromatographed with 20% ethyl acetate in hexanes (a much more polar solvent mixture), what will happen to the Rf? 1) The Rf will still be 0.3. 2) The Rf will be less than 0.3. 3) The Rf will be greater than 0.3. 4) None of the above. View Feedback Question 4 1 / 1 point Match the following structures of functional group to the correct name. "R" means any hydrocarbon group, i.e. only C and H.__5__ R-CO-NH2 __2__ R-OH __3__ R-O-R __1__ R-COOH __4__ R-CH=CH-R 1. carboxylic acid 2. alcohol 3. ether 4. alkene 5. amide...
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- Spring '07
- Amine, Carboxylic acid, Functional group, PM Submission View