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.

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

There are the two possible chair conformations of trans-1-Methyl-4-chlorocyclohexane. What is the energy difference between the two chair conformations?    Table 1. Steric Strain in Monosubstituted Cyclohexanes    a 28 b. 56 c. 4.8 d 9.6

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.

Identity if they are , constitutional isomers, stereoisomers, enantiomers, diastereomers, or conformers.

a. What alkane, with molecular formula C5H12, forms only one monochlorinated product when it is heated with Cl2? b. What alkane, with molecular formula C7H16, forms seven monochlorinated products (disregarding stereoisomers) when heated with Cl2?

True or False: 1. The eclipsed conformation of a linear alkane IS called cis, while the anti conformation of an alkane IS called trans. 2. In the conversion of open-chain D-glucose to the ring form, the aldehyde carbon (carbon #1) bonds to the oxygen on carbon number 5 to form a ring that is both PYRANOSE and UNLOCKED.

Which has a higher percentage of the diequatorial-substituted conformer compared with the diaxialsubstituted conformer: trans-1,4-dimethylcyclohexane or cis-1-tert-butyl-3-methylcyclohexane?

4. Isomers and Stereocenters ( (a) Assign each set of molecules as constitutional isomers, conformational isomers, enantiomers, diastereomers, or identical. Please write the full name for the type. Molecules Type (b) H₂Ca HgC.. CH3 OCH₂ CH3 af OCH, SP H₂C**** H₂C H₂C NGOCH, H.C_OCKS OCH₂ CH₂ H₁C HC H*** CI H H CI Br H3C CH₂ Br (d) E) (0) For each of the following molecules, write the number of stereocenters and circle the center of any stereocenters. (i) (ii) H₂C (онт (eg 5) (b) -CH3 Isegna CH3 on mots eno H₂C CH3

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