C/ CI CI pair B The disubstituted cyclohexanes in pair B are: enantiomers. diastereomers. ○ identical. Consider the disubstituted cyclohexane structures in pair A. Cl CI CI pair A C/ The disubstituted cyclohexanes in pair A are: identical. diastereomers. enantiomers.

12) How are these molecules related? А. conformational isomers В. enantiomers C. diastereomers F D. constitutional isomers

6. State the relationship between each of the following pairs of structures (same, enantiomers, diastereomers, constitutional isomers or different compound that are not isomeric). b CH3 CH3 **CH3 a CH3 OH OH O d d .& & Br s s C/.. CI Br Да Br Brid

Ma Two disubstituted cyclohexane molecules are depicted. Classify the pair as the same compound, enantiomers, diastereomers, constitutional isomers, or not isomeric. CI CI and CI The compounds are: the same compound not isomeric diastereomers enantiomers constitutional isomers CI

Identify each pair of structures below as enantiomers (E), diasteromers (D), or conformers (C).

When two six-membered rings share a C—C bond, this bicyclic system is called a decalin. There are two possible arrangements: trans-decalin having two hydrogen atoms at the ring fusion on opposite sides of the rings, and cis-decalin having the two hydrogens at the ring fusion on thesame side.a.Draw trans- and cis-decalin using the chair form for the cyclohexane rings. b.The trans isomer is more stable. Explain why.

Which of the following statements is not true regarding the conformation of substituted cyclohexanes? O a. the boat conformation of cyclohexane is usually more stable than the chair conformation O b. ring inversion of cyclohexane between two chair conformations takes place via a boat conformation O c. substituted cyclohexanes are destabilized by 1,3-diaxial interactions d. the relative amount of two conformations of substituted cyclohexanes can be determined from the difference in strain energy

a. What hydrocarbon with molecular formula C4H10 forms only two monochlorinated products? Both products are achiral. b. What hydrocarbon with the same molecular formula as in part a forms three monochlorinated products? One is achiral and two are chiral.

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Question 32 Label the following pairs as identical or enantiomers or geometric isomers or constitutional isomers: a. 1,1-dibromocyclobutane and 1,2-dibromocyclobutane b. CI- and Ci or:om CH3 CH3 & C. a.: constitutional isomers; b: identical; c: enantiomers a: geometric isomers; b: enantiomers; c: identical a: geometric isomers; b: diastereomers; c: geometric isomers a: diastereomers; b: enantiomers; c: diasteroemers