Cycloalkanes

1. CYCLOALKANES
BY. PROF. MARY ANN QUILANG-DEOGRACIAS

3. Learning Objectives
• Define cycloalkane
Define
• Identify the properties of cycloalkanes
Identify
• Appreciate the importance of the uses and
applications of cycloalkanes in our everyday lives.
Appreciate
• Name cycloalkanes applying the IUPAC rules.
Name

4. Definition of Cycloalkane
Are cyclic hydrocarbons, they are arranged in
the form of rings.
They are saturated. (single bonded)
They are found in nature or can be created
in the laboratory
The simplest is cyclopropane.

5. Examples:

6. First 8 Cycloalkanes
Cycloalkane Molecular Formula
Cyclopropane C3H6
Cyclobutane C4H8
Cyclopentane C5H10
Cyclohexane C6H12
Cycloheptane C7H14
Cyclooctane C8H16
Cyclononane C9H18
Cyclodecane C10H20

7. Properties of
Cycloalkanes
They have similar properties with alkanes but
they have higher boiling points, melting points.
And higher densities.
The melting point, the boiling point and the
density of cycloalkanes increase as the number of
carbons increases.
They are insoluble in water but soluble in many
organic solvents.
They have little biological activity

8. Uses and
Applications
of
Cycloalkanes
Used in making nylon
Solvents for compounds that do
not dissolve in water
Used in motor oil, kerosene,
diesel and other heavy oils

9. Naming of
Cycloalkanes
The naming of substituted
cycloalkanes follows the same
basic steps used in naming
alkanes.
1. Determine the parent chain.
2. Number the substituents of the
ring so that the sum of the
numbers is the lowest possible.
3. Name the substituents and
place them in alphabetical order.

10. Examples:
1.
2.

11. Exercises:

12. ANSWERS:
SLIDE #10
1) 1-CHLORO CYCLOBUTANE
2.) 1-PROPYL CYCLOHEXANE
SLIDE #2
A. CYCLOHEXANE
B. 1-METHYL CYCLOPENTANE
C. 1,2-DIMETHYL CYCLOBUTANE
D. 1- ETHYL CYCLOBUTANE
E. 1,2,3-TRIMETHYL CYCLOPENTANE