4. Alkanes and Cycloalkanes

There are eight different five-carbon alkyl groups.

a. Draw them.

b. Give them systematic names.

Draw the structures of the following groups, and give their more common names.

a. the (1-methylethyl) group

b. the (2-methylpropyl) group

c. the (1-methylpropyl) group

d. the (1,1-dimethylethyl) group

e. the (3-methylbutyl) group, sometimes called the 'isoamyl' group

Draw the structure that corresponds with each name.

c. sec-butylcycloheptane

d. 2,3-dimethyl-4-propylnonane

Draw the structure that corresponds with each name.

i. tert-butylcyclohexane

j. pentylcyclohexane

Name the following alkanes using the IUPAC system of nomenclature. [Each molecule exemplifies one of the nomenclature rules in Tables 3.7 and 3.8.]

(j) rule 5

Give each substituent on the ten-carbon chain a common name and a parenthetical name

a.

b.

Draw the skeletal structure of 3,3-dimethyl-7-(1-methylethyl)-6-(1-methylpropyl)decane.

Draw a condensed and a skeletal structure for each of the following:

a. 3,4-diethyl-2-methylheptane

Write structures for the following compounds.

a. 3-ethyl-4-methylhexane

b. 3-ethyl-5-isobutyl-3-methylnonane

c. 4-tert-butyl-2-methylheptane

d. 5-isopropyl-3,3,4-trimethyloctane

Which isomers contain an isopropyl group?