Vim li cas Arenes tau txais kev hloov pauv hloov?
Vim li cas Arenes tau txais kev hloov pauv hloov?

Video: Vim li cas Arenes tau txais kev hloov pauv hloov?

Video: Vim li cas Arenes tau txais kev hloov pauv hloov?
Video: TUDev Tech Talk с профессором Борой Озкан - Финтех и будущее финансов 2024, Kaum ib hlis
Anonim

Aromatic compounds los yog arenes tau txais kev hloov pauv , nyob rau hauv uas cov aromatic hydrogen hloov nrog ib tug electrophile, li no lawv cov tshuaj tiv thaiv mus los ntawm electrophilic hloov . Hlau cross-coupling xws li Suzuki tshuaj tiv thaiv tso cai tsim cov pa roj carbon-carbon bonds ntawm ob los yog ntau tshaj cov tshuaj tsw qab.

Yog li, vim li cas benzene tsuas yog hloov pauv cov tshuaj tiv thaiv?

Koj kawm hauv tsev kawm ntawv ntawd tshuaj benzene ua tau raug hloov cov tshuaj tiv thaiv vim hais tias cov delocalised electrons nyob rau hauv nws cov qauv yog ib cheeb tsam ntawm high electron ceev. Yog li ntawd tshuaj benzene ua tau teb nrog ib tug electrophile.

Tsis tas li ntawd, Arene txhais li cas? Ib arene los yog aromatic hydrocarbon yog hydrocarbon nrog alternating ob thiab ib daim ntawv cog lus ntawm carbon atoms ua rings. Arene kuj tuaj yeem xa mus rau: Arene (gastropod), ib tug genus ntawm marine snails nyob rau hauv tsev neeg Areneidae.

Tom qab ntawd, ib tus tuaj yeem nug, vim li cas benzene tau hloov pauv electrophilic ntau dua li cov tshuaj tiv thaiv ntxiv?

Benzene yog ib Planar molecule muaj delocalized electrons saum toj thiab hauv qab lub dav hlau ntawm lub nplhaib. Yog li ntawd, nws yog electron nplua nuj. Yog li ntawd, nws yog qhov txaus nyiam heev rau cov tsiaj tsis muaj hluav taws xob xws li, electrophiles . Yog li ntawd, nws tau txais cov tshuaj electrophilic hloov pauv yooj yim heev.

Vim li cas cov tshuaj tsw qab hydrocarbons tau txais kev hloov pauv ntau dua li cov tshuaj tiv thaiv ntxiv siv cov qauv tshuaj los qhia koj cov lus teb?

Lawv tsis muaj reactivity rau ntxiv cov tshuaj tiv thaiv yog vim tus zoo stability ntawm tus nplhaib tshuab uas tshwm sim los ntawm ua tiav π electron delocalization (resonance). Aromatic compounds teb los ntawm electrophilic aromatic hloov cov tshuaj tiv thaiv , hauv tus aromaticity ntawm tus nplhaib system yog khaws cia.

Pom zoo: