Alkynes

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Alkynes

• ???????????? ??????? ?????? IUPAC
  ????????????????? ???????????????
  ??????????????????????? yne ????

1-butyne
2-butyne
2
1. ????????????????????????????
?.
?.
?.
3

• 2. ????????????????????????????????????????
• Isopropylacetylene
• 1-cyclopentyl-2-butyne
• 1,1-dibromo-5-methyl-3-hexyne

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Preparation of alkynes

• Dehydrohalogenation of alkyl dihalides
• Dehalogenation of tetrahalides
• Reaction of metal acetylides with alkyl halides

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Dehydrohalogenation of alkyl dihalides
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Dehalogenation of tetrahalides
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Reaction of metal acetylides with alkyl halides
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• ??????????????????? 1-pentyne ???????????????????
  ??
• 1-bromopropane
• 1,1-dibromopentane
• 2. ????????????????????????????? 2-hexyne ???
  tetrahalide

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• 3. ?????????????????????????????? ??????????????
  ethyl dibromide
• ?. 1-butyne
• ?. 2-butyne

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• 3. ?. ??????????????????? 1-butyne??????????????
  ethyl dibromide

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• 3. ?. ??????????????????? 2-butyne??????????????
  ethyl dibromide

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Reaction of alkynes

• ??????????????????????????
• (Addition reaction of alkyne)
• Hydrogenation reaction
• Halogenation reaction
• Hydrohalogenation reaction
• Hydration reaction

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Hydrogenation reaction
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Halogenation reaction
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Hydrohalogenation reaction
HX HCl, HBr, HI
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Hydration reaction
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Hydration reaction
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Reaction of alkynes

• 2. ????????????????????????????
• (Substitution reaction of alkyne)
• ??????????????????????????????????????????????????
  ??????????
• ?????????????????????????????????????????????????
  ???????????????????????????????????????????

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Reaction of alkynes

• 2. ???????????????????????????? (???)
• (Substitution reaction of alkyne)
• ???????????????????

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?????????????????????????????????????????????????
??????????????
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??????????????????????????????????????????????????
???????????????????????????????????
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???????????????????
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• 1. ?????????????????????????????????
• Hydration of 2-butyne
• Hydrogenation of 4-methyl-2-pentyne with one mole
  of hydrogen
• Addition reaction of 2,5-dimethyl-3-hexyne with
  two mole of hydrogen bromide

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2. ?????????????????????????????????????????
?????????????????
?.
?.
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