Video: Puas yog benzene rings reactive?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov ntawd yog, benzene yuav tsum pub electrons los ntawm sab hauv nplhaib . Yog li ntawd, tshuaj benzene ua tsawg reactive hauv EAS thaum deactivating pab pawg muaj nyob rau ntawm nws. Cov pab pawg deactivating feem ntau yog cov pab pawg rho tawm hluav taws xob zoo (EWGs). Cov no yog, ntawm sab laug mus rau sab xis: phenol, toluene, tshuaj benzene , fluorobenzene, thiab nitrobenzene.
Yog li ntawd, dab tsi yog qhov reactivity ntawm benzene?
Vim nws high degree ntawm unsaturation, nws yog heev reactive . Tsis zoo li alkenes, nws yeej tsis koom nrog ntxiv, oxidation, thiab txo cov tshuaj tiv thaiv. Piv txwv li, tshuaj benzene yuav tsis hnov mob nrog Br, HCl lossis lwm yam reagents kom ua rau carbon-carbon ob daim ntawv cog lus tsim.
Tsis tas li ntawd, dab tsi yog activated benzene nplhaib? Hloov cov lus teb ntawm Benzene Derivative. Hloov pauv nplhaib tau muab faib ua ob pawg raws li hom kev hloov pauv uas tus nplhaib nqa: Qhib cov nplhaib : cov substituents on the nplhaib yog pab pawg uas pub electrons. Deactivated nplhaib : cov substituents on the nplhaib yog pab pawg uas thim electrons.
Ib yam li ib tug yuav nug, yog vim li cas benzene thiaj li reactive?
Muaj delocalized electrons saum toj thiab hauv qab lub dav hlau ntawm lub nplhaib, uas ua rau tshuaj benzene tshwj xeeb ruaj khov. Benzene tiv thaiv ntxiv cov tshuaj tiv thaiv vim tias cov kev cuam tshuam no yuav cuam tshuam rau kev ua txhaum cai thiab poob qhov kev ruaj ntseg.
Dab tsi yog ntau reactive benzene lossis chlorobenzene?
Raws li qhov tshwm sim ntawm cov hluav taws xob ceev ntawm lub nplhaib aromatic txo qis thiab deactivates lub nplhaib. Chlorobenzene yog tsawg reactive tshaj tshuaj benzene rau electrophilic hloov cov tshuaj tiv thaiv. Li no tshuaj chlorobenzene yog ortho para deactivator thiab tsawg dua reactive tshaj tshuaj benzene.
Pom zoo:
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