Exam 2 2008 Winter

Exam 2 2008 Winter - unl\nr{ev' 06 {xcrnn *z- l. (25...

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Unformatted text preview: unl\nr{ev' 06 {xcrnn *z- l. (25 points) Page 1 w08ex2p1 A. For each ol the following structures, check all the descriptions that apply. no partiat credit Gompound A |-l_l has an enantiomer has at least one chiral diastereomer contains at least one R stereocenter I--x -l has one optically Inactlve diastereomer The NMR speclra 13O-NMR signals:4 Compound B I ||S Op[cafiy rnafirve I x I nas an enanlromer has at least one ohiral diastereomer contains at leasi one R stereocenter has one optically inactive diastereomer T 3 I :J /-ar NaSCHs (c) 9Ht n$/er cl Compound C f-i-l is optically inactivel has at least one chiral diastereomer contains at least one B stereocenter has one optically inactive diastereomer The NMR spectra for the organic product: 1 tt-ruUF signals: 5 (63:3:1 :1 ) A Na: Br- scH3 balance the reaction B. Using the NMR data, give the structures of the missing compounds in the following synthesis. predicted maior regioisomer C. For each of the following PAIRS, check allthe descriptions that apply. no partiatcredit , *n (a) Br '=2CH2Br--1 Br^,, \ \-/"ns ^cH, 4 \\ .,,CH2Br They are conformational isomers. T x _l They are different molecules. t x -l Both are optically active. (b) 9Hs- - oH H/,|1OcHs H.Cfi1n Hklon ,(jcH. CHs ocH; " They are conformational isomers. t-x I They are different molecules. (c) oH H"clxl oH 9H. 'l H fl--,,-/t'', 1 l1---/ n fn ta i H ( Y:',iu J)--l I I ctV;, t I I I ney are enanilomers....
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This note was uploaded on 01/28/2011 for the course CHEM 210 taught by Professor Kiste during the Spring '10 term at Michigan Flint.

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Exam 2 2008 Winter - unl\nr{ev' 06 {xcrnn *z- l. (25...

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