feb_19 - 2/19/2010 Which of the following equilibria would...

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Unformatted text preview: 2/19/2010 Which of the following equilibria would you predict to be more favorable (i.e., larger Keq)? Keq E ∆G˚ ∆G˚ = -RTlnKeq Which of the following equilibria would you predict to be more favorable (i.e., larger Keq)? Keq E ∆G˚ ∆G˚ = -RTlnKeq A 236 A 236 R O C H H HO +H C CN R CN B OCH3 114 B 114 OCH3 Which of the following equilibria would you predict to be more favorable (i.e., larger Keq)? Keq aldehyde A Would the ketone be predicted to have a (A) higher or (B) lower frequency infrared absorption. 236 benzaldehyde ld 1703 cm-1 H O C C H H +H H HO H C C H CN H CN B OCH3 0.77 O C C H H ketone acetophenone 1686 cm-1 H H O cinnamaldehyde H Cinnamomum verum 1 2/19/2010 H H O H H O cinnamaldehyde H cinnamon cinnamaldehyde H cinnamon O muskone H CH3 H H O cinnamaldehyde H cinnamon What is an unambiguous name for the following ketone? O O mentha avarensis mentha avarensis 2 2/19/2010 What is an unambiguous name for the following ketone? What is an unambiguous name for the following ketone? A. 2-isopropyl-5-methylcyclohexanone 2-isopropylB. 5-isopropyl-2-methylcyclohexanone 5-isopropylO C. 5-propyl-2-methylcyclohexanone 5-propylD. None of these O A. 2-isopropyl-5-methylcyclohexanone 2-isopropylB. 5-isopropyl-2-methylcyclohexanone 5-isopropylC. 5-propyl-2-methylcyclohexanone 5-propylD. trans-2-isopropyl-5-methylcyclohexanone trans isopropylE. None of these O H O H H O H H H What is an unambiguous name for the following ketone? What is an unambiguous name for the following ketone? A. 2-isopropyl-5-methylcyclohexanone 2-isopropylB. 5-isopropyl-2-methylcyclohexanone 5-isopropylO C. 5-propyl-2-methylcyclohexanone 5-propylD. trans-2-isopropyl-5-methylcyclohexanone trans isopropylE. (2S, 5R)-2-isopropyl-5-methylcyclohexanone isopropylF. None of these O H H O 1. LiAlH4 O A 1. LiAlH4 2. H3O 1. LiAlH4 C 2. H3O H2/Pd-C B 2. H3O PCC PCC D H2/Pd-C H H What is a good mechanism for the following transformation? O O O O H Zn Zn menthol The distinctive Frangipani has a warm, melodious scent. It has memories of honeysuckle and jasmine, but is neither. This unique fragrance oil lingers on the skin, reminiscent of a warm summer evening when the heat of the day has warmed the scent of the flowers to a rich cocktail of floral notes with a hint of honey. 3 2/19/2010 Propose a method for the preparation of phenylacetaldehyde from benzene and any compounds containing four carbon atoms or less. O H Propose a method for the preparation of phenylacetaldehyde from benzene and any compounds containing four carbon atoms or less. O H O A PCC 1. 2. H3O O Mg Br2 FeBr3 B 1. LiAlH4 2. H2O O Cl AlCl3 C 1. 2. H3O Mg PCC Br2 FeBr3 Propose a method for the preparation of phenylacetaldehyde from benzene and any compounds containing four carbon atoms or less. O H OH 1. O MgBr Mg Br PCC 2. H3O Br2 FeBr3 4 ...
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