4. Alkanes and Cycloalkanes

Draw the condensed structure for each of the following:

a. (Z)-1,3,5-tribromo-2-pentene

b. (Z)-3-methyl-2-heptene

c. (E)-1,2-dibromo-3-isopropyl-2-hexene

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

1.

Draw the structures that correspond to the following names.

(c) (Z)-2-chloro-7-methyloct-2-en-4-yne

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

(c)

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

f.

For each of the following compounds, draw the possible geometric isomers and name each isomer:

b. 1,5-heptadiene

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

(b) ((Z)-1-cyclohexyl-2-methylhept-2-ene

Name the following:

a.

Disregarding stereoisomers, draw the structures of all alkenes with molecular formula C₅H₁₀. Which ones can exist as cis–trans isomers?

Identify the following substituted cycloalkanes as cis or trans.

(c)

Give a correct name for each compound.

(e)

(f)

For those compounds that can exist as cis and trans isomers, draw and label the isomers.

3.

4.

Draw the structure that corresponds to the name provided.

(b) (2R,3R,4S)-heptane-2,3,4-triol

a. Draw the condensed structures and give the systematic names for all the alkenes with molecular formula C₆H₁₂, ignoring stereoisomers. (Hint: There are 13.)

b. Which of the alkenes have E and Z isomers?

c. Which of the alkenes is the most stable?

d. Which of the alkenes is the least stable?

Draw the structures and give the common and systematic names for the seven alkynes with molecular formula C₆H₁₀.