Unit fifteen organic chemistry
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Unit Fifteen Organic Chemistry. Alkenes, Alkynes, Functional Groups and Alcohols. Alkenes and Alkynes. Alkenes – hydrocarbons containing at least one double bond between carbon atoms Alkynes – hydrocarbons containing at least one triple bond between carbon atoms

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Unit Fifteen Organic Chemistry

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Unit fifteen organic chemistry

Unit FifteenOrganic Chemistry


Alkenes alkynes functional groups and alcohols

Alkenes, Alkynes, Functional Groups and Alcohols


Alkenes and alkynes

Alkenes and Alkynes

  • Alkenes – hydrocarbons containing at least one double bond between carbon atoms

  • Alkynes – hydrocarbons containing at least one triple bond between carbon atoms

  • Unsaturated hydrocarbons – they are not loaded to capacity with hydrogens (alkenes and alkynes)

  • Alkenes formula: CnH2n

  • Alkynes formula: CnH2n-2


Alkenes and alkynes1

Alkenes and Alkynes

  • Ethyne (C2H2) is emitted by ripening bananas to send a message to the other bananas to ripen.

  • Ethylene (C2H4) is used to ripen fruit.

  • Why do we put fruit in a paper bag to ripen fruit?

  • How do shippers keep fruit from ripening too soon?


Naming alkenes and alkynes

Naming Alkenes and Alkynes

  • Base chain is the longest chain containing the double or triple bond

  • The base ending is –ene for an alkene and –yne for an alkyne

  • Base chain is numbered to give the double or triple bond the lowest possible number

  • A number indicating the location of the double or triple bond is inserted before the base name


Practice naming

Practice Naming


Functional groups

Functional Groups

  • A characteristic atom or group of atoms

  • A group of organic compounds with the same functional group forms a family


Functional groups1

Functional Groups


Alcohols

Alcohols

  • Organic compounds containing the ―OH functional group

  • General formula is R-OH

  • Naming:

    • Base chain is the longest chain containing the ―OH functional group

    • Base name ends with ―ol

    • Base chain is numbered to give the ―OH the lowest possible number

    • A number indicating the position of the ―OH group is inserted before the base name


Practice naming1

Practice Naming


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