Page 0
Alkynes
March 4, 2014
Page 1
Objectives:
1. Define alkynes
2. Name alkynes using
the IUPAC system
of nomenclature
Page 2
What is an
alkyne?
Page 3
Alkyne
An unsaturated
hydrocarbon that
contains a carbon –
carbon triple bond
Page 4
Alkyne
General Formula:
CnH2n-2
Page 5
Naming Alkynes
The key to the IUPAC name
of an alkyne is the ending
–yne, which shows the
presence of a carbon-carb...
Page 6
Examples
HC CH
Ethyne
CH3C CH
Propyne
Page 7
Naming Alkynes
1. In higher alkynes, number the
longest carbon chain that contains
the triple bond from the end tha...
Page 8
Naming Alkynes
2. Naming branched alkynes
is the same with those of
alkenes. The same rules
apply.
Page 9
Examples
Page 10
Examples
Page 11
Page 12
QUIZ – ¼ sheet
Name the following:
1.
Page 13
2.
Page 14
3.
Page 15
4.
Page 16
5.
Page 17
Assignment
Give the importance of
alkynes.
Page 18
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Demo presentation - alkynes

  1. 1. Page 0 Alkynes March 4, 2014
  2. 2. Page 1 Objectives: 1. Define alkynes 2. Name alkynes using the IUPAC system of nomenclature
  3. 3. Page 2 What is an alkyne?
  4. 4. Page 3 Alkyne An unsaturated hydrocarbon that contains a carbon – carbon triple bond
  5. 5. Page 4 Alkyne General Formula: CnH2n-2
  6. 6. Page 5 Naming Alkynes The key to the IUPAC name of an alkyne is the ending –yne, which shows the presence of a carbon-carbon triple bond.
  7. 7. Page 6 Examples HC CH Ethyne CH3C CH Propyne
  8. 8. Page 7 Naming Alkynes 1. In higher alkynes, number the longest carbon chain that contains the triple bond from the end that gives the lower set of numbers to the triply bonded carbons. Indicate the location of the triple bond by the number of its first carbon atom.
  9. 9. Page 8 Naming Alkynes 2. Naming branched alkynes is the same with those of alkenes. The same rules apply.
  10. 10. Page 9 Examples
  11. 11. Page 10 Examples
  12. 12. Page 11
  13. 13. Page 12 QUIZ – ¼ sheet Name the following: 1.
  14. 14. Page 13 2.
  15. 15. Page 14 3.
  16. 16. Page 15 4.
  17. 17. Page 16 5.
  18. 18. Page 17 Assignment Give the importance of alkynes.
  19. 19. Page 18

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