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ALKENE By: Bhumika Patel
What is Alkene? • According to chem. libretexts. org alkenes are a class of hydrocarbon unsaturated compounds • Contain only carbons and hydrogens • Have at least one carbon-to-carbon double bond • Another name is Olefins • https: //chem. libretexts. org/Bookshelves/Organic_Chemistr y/Supplemental_Modules_(Organic_Chemistry)/Alkenes
What does Alkene Look Like? • According to pubs. acs. . org carbon double bonds allow rotation. • Geometric Isomers are present due to restricted rotation around C double bond. • Structural Isomers are in Alkenes when using addition and in general. (straight chains) • https: //pubs. acs. org/doi/10. 102 1/ed 082 p 1329
Function of Alkene • Important to industrial field • Alkenes are used as starting material in synthesis of alcohol, plastics, laquers, detergents, and fuels • Most important are ethene, propene, and 1, 3 -butene
Alkene Molecular Formula • Starts with 2 H and then add on • N= Number of carbon atoms • Starts at 2 because nethene does not exist because it would not have a double bond. This Photo by Unknown author is licensed under CC BY-SA-NC.
Alkene Characteristics/ Functional Properties Characteristics Functional Properties • Double bonds • Less dense than water • Contain 1 sigma and 1 pi bond between 2 carbon atoms • Present polarity due to double bond • Carbons in double bonds are sp 2 hybridized which form planar structure • Have higher acidity than alkanes • Stability • Abundance(found in oils) • Exist naturally in gases, liquids, and solids
Cool Concepts of Alkene Important for Biochemistry 1. Alkenes can be transformed into almost any other functional group you can name which is important when reacting to other compounds. 1. Suffix of the name indicates which functional group is present 1. Ex. -CH 2=CH 2 this is ethene not ethane 2. Alkenes are very important to biochemistry because Alkenes like ethene, propene, and 1, 3 - butene are mostly used in chemical industries. They are also used as feedstocks. 3. Alkenes burn in air or oxygen but that doesn't really matter. The pi bond breaks and electrons from H are used to join the two carbon atoms to other things. Pi bonds are more reactive than sigma bonds, and the bonds are sp 2 hybridized which form a important planar structure which creates different Alkenes in biochemistry.