Kev xaiv A) SN1 cov tshuaj tiv thaiv yog ib qho uas carbocation ua ib qho nruab nrab yog tsim thiab nucleophile tuaj yeem tawm tsam los ntawm ob txoj haujlwm, cov tshuaj tiv thaiv no yog unimolecular thiab tus nqi tsuas yog nyob ntawm thawj kauj ruam. … Cov tshuaj tiv thaiv tau hais tias yog stereoselective raws li cov khoom lag luam loj.
Puas yog SN1 cov tshuaj tiv thaiv stereospecific lossis stereoselective?
Piv txwv li: SN2 yog stereospecific. Txawm li cas los xij, nws yog qhov ua tau tag nrho rau SN1 cov tshuaj tiv thaiv los ua 100% stereoselective yog tias muaj qhov tsis zoo vim li cas ib lub ntsej muag ntawm carbocation intermediate yog nkag tsis tau kiag li.
Koj tuaj yeem qhia tau li cas yog tias qhov tshuaj tiv thaiv yog stereospecific lossis stereoselective?
Xav txog qhov stereochemical nta ntawm cov reactants los txiav txim stereospecificity los yog tsis muaj.o Yog tias lwm qhov stereoisomer ntawm cov reactant yuav muab cov khoom zoo tib yam hauv qhov sib piv, ces cov tshuaj tiv thaiv tsis yog stereospecific. o Yog tias qhov sib txawv stereoisomer ntawm cov reactant lossis reagent muab ib qho stereoisomerically …
Puas yog E2 stereospecific lossis stereoselective?
To summarize, the E2 elimination is stereoselective vim nws "xaiv" los tsim cov stereoisomer ruaj khov. Feem ntau, koj yuav tsis raug hais kom kos Newman qhov kev kwv yees los piav qhia qhov kev xaiv tsis zoo ntawm E2 cov tshuaj tiv thaiv. Thiab txhawm rau txiav txim siab cov khoom lag luam loj, tsuas yog xaiv cov alkene ruaj khov dua.
Cov tshuaj tiv thaiv twg yog stereospecific?
A stereospecific cov tshuaj tiv thaiv yog ib qho uas, thaum ua nrog cov khoom siv stereoisomeric pib, muab khoom los ntawm ib qho reactant uas yog stereoisomer ntawm cov khoom los ntawm lwm tus.
