Video: Vim li cas alkenes qhia cov tshuaj tiv thaiv electrophilic ntxiv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Alkenes teb vim hais tias cov electrons nyob rau hauv lub pi daim ntawv cog lus nyiam tej yam nrog ib tug degree ntawm zoo nqi. Txhua yam uas ua kom cov electron ceev nyob ib ncig ntawm ob daim ntawv cog lus yuav pab tau qhov no. Alkyl pawg muaj qhov nyiam "them" electrons deb ntawm lawv tus kheej mus rau ob daim ntawv cog lus.
Kuj tseem paub yog, vim li cas alkenes tau txais cov tshuaj tiv thaiv electrophilic ntxiv?
Alkenes feem ntau undergo electrophilic ntxiv cov tshuaj tiv thaiv ntawm carbon-carbon ob daim ntawv cog lus. Alkenes muaj loosely tuav pi electrons, ib qhov chaw rau lub electrophilic nres, uas yog vim li cas. Cov electrophilic kev tawm tsam ua rau muaj qhov nruab nrab carbocation uas yog qhov tshwm sim ntawm qhov Assertion.
Ib tug kuj yuav nug, dab tsi yog qhov ntxiv cov tshuaj tiv thaiv ntawm alkenes? Ntxiv cov tshuaj tiv thaiv yog thaum ob yam me me los ua ib yam khoom loj. Piv txwv li, lub tshuaj tiv thaiv ntawm bromine (HBr) thiab propene (C_3H_6) yog ib qho ntxiv cov tshuaj tiv thaiv . Nyob rau hauv cov ntaub ntawv no, ib tug electrophile lov li ob daim ntawv cog lus, yog li tso cai rau cov pa roj carbon rau cov tshiab atom tshiab los yog atoms.
Tib neeg kuj nug, dab tsi yog qhov piv txwv ntawm cov tshuaj tiv thaiv electrophilic ntxiv?
Cov cov tshuaj tiv thaiv yog piv txwv ntawm electrophilic ntxiv . Hydrogen chloride thiab lwm yam hydrogen halides ntxiv rau hauv tib txoj kev. Rau piv txwv , hydrogen chloride ntxiv rau ethene los ua chloroethane: Qhov txawv tsuas yog nyob rau hauv ceev npaum li cas cov tshuaj tiv thaiv tshwm sim nrog cov sib txawv hydrogen halides.
Qhov ntxiv electrophilic txhais li cas?
Electrophilic ntxiv yog ib qho tshuaj tiv thaiv ntawm ib electrophile thiab nucleophile, ntxiv rau ob lossis triple bonds. Ib electrophile yog txhais los ntawm ib tug molecule nrog ib tug nyiam hnov mob nrog rau lwm cov molecules uas muaj ib tug donatable khub ntawm electrons.
Pom zoo:
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