4. Alkanes and Cycloalkanes

Identify the following alkynes as terminal (T), internal/symmetrical (IS), or internal/unsymmetrical (IU).

(a)

Identify the following alkynes as terminal (T), internal/symmetrical (IS), or internal/unsymmetrical (IU).

(c)

Identify the following alkynes as terminal (T), internal/symmetrical (IS), or internal/unsymmetrical (IU).

(f)

Identify the allylic carbon(s) in the following molecules.

(c)

Identify the allylic carbon(s) in the following molecules.

(b)

Identify the allylic carbon(s) in the following molecules.

(a)

How many hydrogens would you expect a 24-carbon compound from each of the following molecular classes to have?

(b) Alkene

a. How many vinylic hydrogens does cyclopentene have?

b. How many allylic hydrogens does it have?

Draw and label the E and Z isomers for each of the following:

c.

How many of the following names are correct? Correct the incorrect names.

a. 3-pentene

b. 2-octene

c. 2-vinylpentane

How many of the following names are correct? Correct the incorrect names.

d. 1-ethyl-1-pentene

e. 5-ethylcyclohexene

f. 5-chloro-3-hexene

Which of the following names are correct? Correct those that are not correct.

c. 4-chloro-2-pentyne

d. 2,3-dimethyl-5-octyne

Draw a condensed structure for each of the following:

i. diethylacetylene

j. di-tert-butylacetylene

Draw a condensed structure for each of the following:

k. cyclopentylacetylene

l. 5,6-dimethyl-2-heptyne

Draw the structure for each of the following:

a. 3,3-dimethylcyclopentene

b. 6-bromo-2,3-dimethyl-2-hexene