Yuav ua li cas alkenes teb nrog hydrogen?
Yuav ua li cas alkenes teb nrog hydrogen?

Video: Yuav ua li cas alkenes teb nrog hydrogen?

Video: Yuav ua li cas alkenes teb nrog hydrogen?
Video: Txoos Xwm khiav mus ua dab.8/25/2018 2024, Kaum ib hlis
Anonim

Ib qho piv txwv ntawm ib alkene ntxiv tshuaj tiv thaiv yog ib txoj kev hu ua hydrogenation. In a hydrogenation tshuaj tiv thaiv , ob hydrogen atoms yog ntxiv hla ob daim ntawv cog lus ntawm ib qho alkene , ua rau saturated alkane. A hydrogen atom yog ces pauv rau tus alkene , tsim ib daim ntawv cog lus C-H tshiab.

Tsis tas li ntawd, cov xwm txheej twg tsim nyog hauv cov tshuaj tiv thaiv ntawm alkenes nrog hydrogen?

Alkenes undergo ib qho ntxiv tshuaj tiv thaiv nrog hydrogen nyob rau hauv lub xub ntiag ntawm ib tug catalyst los tsim ib tug saturated compound. Ethene tsis teb nrog hydrogen raws li qub tej yam kev mob . Tab sis nyob rau hauv lub xub ntiag ntawm ib tug catalyst xws li nickel lub tshuaj tiv thaiv yuav siv qhov chaw ntawm 150 ° C.

Qhov thib ob, ua li cas thaum propene reacts nrog hydrogen? Raws li nrog tag nrho cov alkenes, unsymmetrical alkenes nyiam propene react nrog hydrogen bromide nyob rau hauv txias. Ob daim ntawv cog lus tawg thiab a hydrogen atom xaus mus txuas rau ib qho ntawm cov carbons thiab ib qho bromine atom rau lwm tus. Nyob rau hauv cov ntaub ntawv ntawm propene , 2-bromopropane yog tsim.

Xav txog qhov no, alkenes ua li cas nrog?

Key Takeaway. Alkenes undergo ntxiv cov tshuaj tiv thaiv , ntxiv cov khoom xws li hydrogen, bromine, thiab dej hla cov pa roj carbon-rau-carbon ob daim ntawv cog lus.

Yuav ua li cas alkenes teb nrog chav?

Qhov no tshuaj tiv thaiv tig alkenes nyob rau hauv alkanes los ntawm kev sib ntxiv ntawm ib tug molecule ntawm hydrogen gas. Cov txheej txheem no yog ntxiv dej (hauv daim ntawv ntawm chav ) rau ib alkene ua muab cawv. Cov tshuaj tiv thaiv yuav tsum muaj qhov kub thiab txias, uas hloov cov dej mus rau hauv chav , as well as a (acidic) catalyst.

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