Qhov sib txawv tseem ceeb ntawm qhov sib luag thiab tsis sib haum xeeb alkenes yog tias symmetrical alkenes muaj ob npaug sib txuas carbon atoms bearing tib ligands, whereas unsymmetrical alkenes muaj doubly bonded carbon atoms bearing sib txawv ligands.
Alkenes yog cov organic tebchaw uas muaj ib lossis ntau dua carbon-carbon ob daim ntawv cog lus. Cov no yog hom hydrocarbons vim tias alkene tsuas muaj cov pa roj carbon thiab hydrogen atoms. Feem ntau, peb hu lawv olefins. Peb tuaj yeem txheeb xyuas ob yam loj ntawm alkenes li davhlau ya nyob twg thiab sab hauv alkenes raws li qhov chaw ntawm ob daim ntawv cog lus hauv cov saw hlau hydrocarbon. Txawm li cas los xij, peb tuaj yeem faib cov alkenes rau hauv symmetrical thiab unsymmetrical alkenes nyob ntawm seb cov txiaj ntsig ntawm ob daim ntawv cog lus ntawm qhov sib xyaw ntawm cov organic compound.
Symmetrical Alkenes yog dab tsi?
Symmetrical alkenes yog ib hom alkene hydrocarbons uas muaj cov ligands zoo sib xws nrog rau cov pa roj carbon atoms. Yog li ntawd, peb tuaj yeem hu ua carbon-carbon ob daim ntawv cog lus nyob rau hauv hom tshuaj lom neeg no ua ib daim ntawv cog lus ob npaug. Ntawm no, cov ligands uas txuas nrog cov pa roj carbon atoms yuav lossis tsis zoo ib yam. Cia peb xav txog ib qho piv txwv kom nkag siab qhov tshwm sim no.
Daim duab 01: Ob Qhov Sib Txuas Alkene Compounds
Daim duab saum toj no qhia tau hais tias ob lub alkene sib xyaw ua ke. Cov no yog cis-trans isomers, thiab lawv muaj ob npaug sib txuas cov pa roj carbon atoms uas txuas nrog ib pawg methyl thiab hydrogen atom ntawm txhua cov pa roj carbon atom. Cov no yog cov symmetrical alkenes vim lawv muaj cov ligands zoo sib xws nrog rau txhua ob-bonded carbon atom.
Dab tsi yog Unsymmetrical Alkenes?
Unsymmetrical alkenes yog hom alkene hydrocarbons uas muaj cov ligands sib txawv txuas rau ob npaug sib txuas cov pa roj carbon atoms. Yog li ntawd, peb tuaj yeem hu ua carbon-carbon ob daim ntawv cog lus nyob rau hauv hom tshuaj lom neeg no ua ib qho nyiaj tsis sib xws. Hauv cov molecules, cov ligands uas txuas nrog cov pa roj carbon atoms yog qhov tseem ceeb tsis zoo ib yam. Cia peb xav txog qee qhov piv txwv kom nkag siab qhov tshwm sim no.
Daim duab 02: Ib qho tsis sib xws Aliphatic Alkene
Hauv daim duab 2, muaj ib pawg methyl thiab hydrogen atom txuas rau sab xis-sab carbon atom thiab ob lub hydrogen atoms txuas rau sab laug sab carbon atom. Cov tshuaj lom neeg ua rau tsis sib haum vim tias muaj cov ligands sib txawv txuas rau txhua cov pa roj carbon atom.
Daim duab 03: Ib qho tsis sib xws Aromatic Alkene
Nyob rau hauv daim duab 3, cov reactant yog ib qho tsis sib xws alkene compound. Nws muaj ob qhov sib txuas ua ke carbon atoms txuas rau cov ligands sib txawv; ib cov pa roj carbon atom txuas nrog hydrogen atom thiab cov pa roj carbon atom ntawm lub nplhaib sib txuas, hos lwm cov pa roj carbon atom txuas rau ib pawg methyl thiab cov pa roj carbon atom ntawm cov qauv nplhaib.
Qhov txawv ntawm Symmetrical thiab Unsymmetrical Alkenes yog dab tsi?
Alkenes tuaj yeem muab faib ua ob pawg ua symmetrical thiab unsymmetrical alkenes raws li symmetry ntawm cov molecule. Qhov sib txawv tseem ceeb ntawm symmetrical thiab unsymmetrical alkenes yog tias symmetrical alkenes muaj ob npaug sib txuas carbon atoms bearing tib ligands, whereas unsymmetrical alkenes muaj ob npaug bonded carbon atoms bearing sib txawv ligands.
Daim duab hauv qab no nthuav tawm qhov sib txawv ntawm qhov sib luag thiab tsis sib haum xeeb alkenes hauv daim ntawv tabular.
Summary – Symmetrical vs Unsymmetrical Alkenes
Alkenes yog cov tshuaj hydrocarbon. Lawv muaj tsawg kawg yog ib qho carbon-carbon ob daim ntawv cog lus. Qhov sib txawv tseem ceeb ntawm symmetrical thiab unsymmetrical alkenes yog tias symmetrical alkenes muaj ob npaug sib txuas carbon atoms bearing tib ligands, whereas unsymmetrical alkenes muaj ob npaug bonded carbon atoms bearing sib txawv ligands.
