As noted before, alkenes are hydrocarbons with carbon-to-carbon double bonds (R2C=CR2) and also alkynes are hydrocarbons through carbon-to-carbon triple bond (R–C≡C–R). Collectively, lock are referred to as unsaturated hydrocarbons because they have fewer hydrogen atoms 보다 does one alkane with the same number of carbon atoms, as is shown in the following general formulas:

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The double bond is mutual by the two carbons and also does not involve the hydrogen atoms, although the condensed formula does no make this point obvious. Keep in mind that the molecular formula for ethene is C2H4, whereas that for ethane is C2H6.

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The very first two alkenes in Table (PageIndex1), ethene and propene, are most often referred to as by their common names—ethylene and propylene, respectively (Figure (PageIndex1)). Ethylene is a major commercial benidormclubdeportivo.orgical. The us benidormclubdeportivo.orgical industry produces about 25 billion kilograms that ethylene annually, much more than any other fabricated organic benidormclubdeportivo.orgical. More than half of this ethylene goes right into the manufacture of polyethylene, one of the most acquainted plastics. Propylene is also an essential industrial benidormclubdeportivo.orgical. That is converted to plastics, isopropil alcohol, and also a range of other products.


Example (PageIndex1)

Name each compound.

Exercise (PageIndex1)

Name each compound.

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Briefly recognize the necessary distinctions between an alkene and also an alkane.