4. Alkanes and Cycloalkanes

Name the following:

a.

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

d. 1,3-cyclohexadiene

e. cycloocta-1,4-diene

f. (Z)-3-methyl-2-octene

Name the following:

c.

1. Determine which of the following compounds show cis-trans isomerism.

2. Draw and name the cis and trans (or Z and E) isomers of those that do.

a. hex-3-ene

b.buta-1,3-diene

For the compound 1-ethyl-3-isopropylcyclopentane,

(a) draw two different cis and two different trans isomers.

a. Which of the following compounds can exist as cis–trans isomers?

Given the name, draw the structure of the following alkenes.

(c) (Z)-3-isopropylhept-3-ene

Do the following compounds have the E or the Z configuration?

e.

Identify the following alkenes as E or Z, if appropriate.

(d)

Determine the IUPAC name of the following molecule 

Do the following compounds have the E or the Z configuration?

c.

d.

Some of the following examples can show geometric isomerism, and some cannot. For the ones that can, draw all the geometric isomers, and assign complete names using the E-Z system.

c. 3-bromo-2-methylhex-3-ene

d. penta-1,3-diene

Do the following compounds have the E or the Z configuration?

b.

Write structural formulas for the following compounds (includes both old- and new-style names).

g. 5,5-dibromo-4-phenylcyclooct-1-yne

h. (E)-6-ethyloct-2-en-4-yne

i.1,4-heptadiyne

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

a. 3-ethyl-1,1-dimethylcyclohexane