Podcast
Questions and Answers
In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon ______ bond.
In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon ______ bond.
double
Terminal alkenes are also known as ______-olefins.
Terminal alkenes are also known as ______-olefins.
α
The International Union of Pure and Applied Chemistry (IUPAC) recommends using the name 'alkene' only for acyclic hydrocarbons with just one ______ bond.
The International Union of Pure and Applied Chemistry (IUPAC) recommends using the name 'alkene' only for acyclic hydrocarbons with just one ______ bond.
double
Acyclic alkenes, with only one double bond and no other functional groups (also known as ______-enes) form a homologous series of hydrocarbons with the general formula CnH2n.
Acyclic alkenes, with only one double bond and no other functional groups (also known as ______-enes) form a homologous series of hydrocarbons with the general formula CnH2n.
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Alkenes are generally colorless ______-polar compounds.
Alkenes are generally colorless ______-polar compounds.
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Study Notes
Alkenes Definition
- An alkene is a hydrocarbon containing a carbon–carbon double bond.
Characteristics
- The double bond can be internal or in the terminal position.
- Terminal alkenes are also known as α-olefins.
IUPAC Nomenclature
- The International Union of Pure and Applied Chemistry (IUPAC) recommends using the name "alkene" only for acyclic hydrocarbons with just one double bond.
- Alkadiene, alkatriene, etc., or polyene are used for acyclic hydrocarbons with two or more double bonds.
- Cycloalkene, cycloalkadiene, etc. are used for cyclic hydrocarbons.
- "Olefin" is used for the general class – cyclic or acyclic, with one or more double bonds.
Acyclic Alkenes
- Acyclic alkenes are hydrocarbons with only one double bond and no other functional groups.
- They form a homologous series with the general formula CnH2n, where n is 2 or more (two hydrogens less than the corresponding alkane).
- Isomers are possible when n is four or more, distinguished by the position and conformation of the double bond.
Physical Properties
- Alkenes are generally colorless and non-polar compounds.
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Description
Test your knowledge of alkene structures and nomenclature in this organic chemistry quiz. Identify the different types of alkenes and their characteristics, and learn the IUPAC naming conventions for these compounds. Challenge yourself with questions about internal and terminal alkenes, as well as polyenes.
