ࡱ>  bjbj ."@t8O$s,1<:$mR\\\\\\\cSOX\01\a4a\a\@\1a : 1. Draw a sawhorse projection for the syn and anti conformations of 1,2-ethanediol, HO-CH2-CH2-OH. 2. Draw Newman projections for the conformational isomers of 1,2-ethanediol; start with the anti conformation and proceed through all the eclipsed and staggered conformations until you arrive back at the anti structure. You should have a total of six structures. LABEL each as eclipsed or staggered. 3a. Draw Newman projections for the staggered conformations of 1,2-dichloropropane by looking down the C(1)-C(2) bond (ignore the eclipsed conformations).  EMBED ChemDraw.Document.6.0  b. Which structure would be expected to have the highest potential energy? Explain briefly. 4. Draw Haworth structures for the following: a. cis-1,2-dimethylcyclopropane b. trans-1-bromo-3-chlorocyclbutane c. cis-1-methyl-3-bromocyclopentane d. trans-1-t-butyl-3-isopropylcyclohexane 5. Draw Newman projections for the following: a. chair cyclohexane b. cis-1,4-dimethylcyclohexane (chair conformer) 6. a. Draw a Newman projection for (trans, trans)-1,4-dibromo-1,4-dimethylcyclohexane. Use the perspective as shown in the cartoon below.  EMBED ChemDraw.Document.6.0  b. Circle the planar cyclohexane below that represents the same structure in the cartoon (a).  EMBED ChemDraw.Document.6.0  7. You must draw both cis and trans isomers and the ring flip for each to answer this question: Which isomer is more stable: cis-1-t-butyl-3-methylcyclohexane or trans-1-t-butyl-3-methylcyclohexane?     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