Video: Dab tsi yog e1 hauv chemistry?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev tshem tawm Unimolecular ( E1 ) yog cov tshuaj tiv thaiv uas qhov kev tshem tawm ntawm HX hloov pauv tau tsim los ntawm ob daim ntawv cog lus. Nws zoo ib yam li cov tshuaj tiv thaiv nucleophilic unimolecular hloov pauv (SN1) nyob rau hauv ntau txoj kev. Ib qho yog qhov tsim ntawm carbocation nruab nrab.
Kuj nug, e1 yog dab tsi?
E1 . A 2.048 Mbps point-to-point mob siab rau, digital circuit muab los ntawm cov tuam txhab xov tooj hauv Europe. E1 yog European tus khub ntawm North American T1 kab, uas kis tau ntawm 1.544 Mbps, thiab E1 thiab T1 kab tuaj yeem sib cuam tshuam rau kev siv thoob ntiaj teb.
Ib tug kuj yuav nug, vim li cas e1 cov tshuaj tiv thaiv tseem ceeb? Kev tshem tawm cov tshuaj tiv thaiv yog tseem ceeb raws li ib txoj kev rau kev npaj ntawm alkenes. Lub sij hawm " tshem tawm " piav qhia qhov tseeb tias me me molecule ploj thaum lub sijhawm ua haujlwm.
Hais txog qhov no, tus nqi txiav txim siab npaum li cas hauv cov tshuaj tiv thaiv e1?
Hauv ib E1 cov tshuaj tiv thaiv , cov tus nqi txiav txim kauj ruam yog qhov poob ntawm pawg tawm mus tsim cov carbocation nruab nrab. Qhov ruaj khov dua qhov carbocation yog, qhov yooj yim dua nws yog tsim, thiab qhov nrawm dua E1 cov tshuaj tiv thaiv yuav yog.
Puas yog e1 lossis e2 sai dua?
Mechanistically, E2 kev tshwm sim yog concerted (thiab tshwm sim sai dua ), hos E1 cov tshuaj tiv thaiv yog stepwise (thiab tshwm sim qeeb thiab ntawm tus nqi zog dua, feem ntau). Vim E1 os Mechanistic cwj pwm, carbocation rearrangements yuav tshwm sim nyob rau hauv nruab nrab, xws li hais tias tus nqi zoo yog rhais chaw nyob rau cov feem ntau ruaj khov carbon.
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