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2.24 quiz key - Weekly Quiz 1 Draw all the...

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Weekly Quiz February 24, 2006 1. Draw all the isomers (constitutional and cis-trans) for C 4 H 6 Cl 2 . Draw all isomers (constitutional and stereoisomers) For C 4 H 6 Cl 2 : * You can have 3 different four carbon rings that Cl can be substituted on—2 of these constitutional isomers have cis and trans isomers. Dichlorocyclobutane Cl Cl Cis -1,2-dichlorocyclobutane Cl Cl Trans -1,2-dichlorocyclobutane Cl Cl Cis -1,3-dichlorocyclobutane Cl Cl
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Trans -1,3-dichlorocyclobutane Cl Cl You can have numerous substituted cyclopropane rings. Remember that the terms cis and trans are relational. They describe the relationship between two substituents. For example, in the first structure below (labeled), the two Cl groups are cis to one another and the Cl on carbon 2 and the CH 3 on carbon 1 are trans to one another. Cl Cl CH 3 CH 3 Cl Cl Cl Cl CH 3 CH 3 Cl Cl CH 3 Cl Cl Cl Cl CH 3 1 2 3 2. Which isomer (cis or trans) of 1-bromo-3-methoxyCYCLOHEXANE is most stable?
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