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5.3 Alkyne Reactions

5.3 Alkyne Reactions. 5.3.1 Ethyne. LO: I know the structure of the simplest alkyne. H. C. C. H. An alkyne is a hydrocarbon with one carbon to carbon bond. triple. ethyne. The simplest alkyne is. C 2 H 2. Formula. Structure. The old name for ethyne is. acetylene.

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5.3 Alkyne Reactions

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  1. 5.3 Alkyne Reactions 5.3.1 Ethyne LO: I know the structure of the simplest alkyne.

  2. H C C H An alkyne is a hydrocarbon with one carbon to carbon bond. triple ethyne The simplest alkyne is . C2H2 Formula Structure The old name for ethyne is . acetylene LO: I know the structure of the simplest alkyne.

  3. 5.3.2 Alkyne Structures and Names LO: I understand the structure and nomenclature of alkynes.

  4. The general formula for the alkynes is . but-1-yne C4H6 3-propylhex-1-yne C9H16 CnH2n-2 LO: I understand the structure and nomenclature of alkynes.

  5. 5.3.3 Alkyne Addition Reactions LO: I understand how alkynes undergo addition.

  6. Addition reactions in alkynes take place in two stages: Stage 1 Addition of chlorine: + Cl2 but-2-yne 2,3-dichlorobut-2-ene The product of this first stage is still . unsaturated LO: I understand how alkynes undergo addition.

  7. Stage 2 Addition of more chlorine: + Cl2 2,3-dichlorobut-2-ene 2,2,3,3-tetrachlorobutane The product of this stage is now . saturated LO: I understand how alkynes undergo addition.

  8. Addition of hydrogen chloride: + HCl Stage 1 propyne 2-chloropropene Stage 2 + HCl 2-chloropropene 2,2-dichloropropane LO: I understand how alkynes undergo addition.

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