CH151Exam2KEYF07

CH151Exam2KEYF07 - 1(18 points For each pair of molecules...

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Unformatted text preview: 1) (18 points) For each pair of molecules shown below, indicate the relationship: enantiomers, diastereomers, constitutional isomers, or the same molecule. 2. -t\ cH2oH ythrose a) simPle sugar (e2!"n€rS ct+3 2) (18 points) ^ _l t a) Label each asymmetic carbon as R or S. J pB C(l-l* b) Label each of the following molecules as CHIRAL, ACHIRAL, OR ACHIRAL/MESO.-> cystine l^AegoO cooH H,rufH HtoH CHs c) threonine i 6tl T rr'{*v 1'"oh),. vr-rr.\ \A{€ I- fno drrb\e g.nXtt"t. 5 3) (22 points) a) Circle the molecule that you would add to racemic 2-phenylpropanoic acid, 3 .^ ^@ shown below, to allow for resolution of the enantiomers by crystallization. gC Y (W d,trra\-_=_P <_ Sfnal'l- .',x t\-9d u ^V& 6Lr.L ? e-. "08.0,+ t R/dl-la F." &s) @l +p- H NH, ..1 5 b) Circle the strongest acid in water' .a\ Brtt. O? , '' t{ c) circle each of the bases that you would expect to deprotonate methanol (cHroH) to give methoxide ion (CHrO-) in high yit ' ' ' - - '-:r:L-':"- t, to give methoxide ion (CHrO-) ln nlgn yl( with O., then MerS....
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This note was uploaded on 05/13/2010 for the course CHEM 151L taught by Professor Roy,christopher during the Fall '08 term at Duke.

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CH151Exam2KEYF07 - 1(18 points For each pair of molecules...

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