4. Alkanes and Cycloalkanes

Each of the following descriptions applies to more than one alkane. In each case, draw and name two structures that match the description. c. a cis-diethylcyclohexane d. a trans-dihalocyclopentane

b. Draw and name the six isomeric cyclopentanes of molecular formula C7H14. These will include four constitutional isomers, of which two show geometric (cis-trans) stereoisomerism.

a. Draw and name the five cycloalkane structures of formula C5H10. Can any of these structures give rise to geometric (cis-trans) isomerism? If so, show the cis and trans stereoisomers.

trans-1,2-Dimethylcyclobutane is more stable than cis-1,2-dimethylcyclobutane, but cis-1,3-dimethylcyclobutane is more stable than trans-1,3-dimethylcyclobutane. Use drawings to explain these observations.