4. Alkanes and Cycloalkanes

Which of the following cycloalkanes are capable of geometric (cis-trans) isomerism? Draw the cis and trans isomers.

b. 1-ethyl-3-methylcycloheptane

Draw the cis and trans isomers for the following:

b. 1-ethyl-3-methylcyclobutane

Given the following alkene, determine its configuration: $\mathrm{CH}=\mathrm{CH}$ with one carbon bonded to ${\mathrm{Br}}_1$ and $H_1$, and the other carbon bonded to ${\mathrm{Cl}}_1$ and $H_2$. The ${\mathrm{Br}}_1$ and ${\mathrm{Cl}}_1$ are on the same side of the double bond. Is this alkene E, Z, or neither?

Which of the following structures represent the same compound? Which ones represent different compounds?

(b)

Draw skeletal structures for the compounds in Problem 3, including any cis–trans isomers.

2.

Which statement correctly describes the difference between $\mathrm{cis}$ and $\mathrm{trans}$ isomers for a planar trisubstituted cyclohexane?

Which of the following molecules can exhibit cis-trans isomerism?

Provide the IUPAC name for the following molecules.

(a)

Why does cis-2-butene have a higher boiling point than trans-2-butene?

Which of the following statements about trans fats is accurate?

Given the following alkene: $C=C$ where each carbon is bonded to a methyl group (${\mathrm{CH}}_3$) and a hydrogen atom, which configuration does the compound have according to the Cahn-Ingold-Prelog (CIP) priority rules?

Which of the following statements correctly describes the difference between $\mathrm{cis}$ and $\mathrm{trans}$ isomers in alkenes?

Draw a structure for each compound (includes old and new names).

g. vinylcyclopropane

h. (Z)-2-bromo-2-pentene

Name the following:

a.

b.