Video: Puas yog radical ntxiv syn lossis anti?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
H-Br, yog li ntawd, tuaj yeem hnov qab ntawm ob lub ntsej muag dawb radical [npe 2]. Yog tias nws tawm tsam tib lub ntsej muag li Br, ces peb tau txais " syn ” khoom. Yog hais tias nws tawm tsam ntawm lub ntsej muag opposite ntawm Br, ces cov khoom yog " tiv thaiv “.
Tsis tas li ntawd, yog HBr ntxiv syn lossis anti?
HBr Ntxiv Nrog Radical Yields 1-bromoalkene Syn ntxiv yog thaum ob qho tib si Hydrogens txuas rau tib lub ntsej muag lossis sab ntawm ob daim ntawv cog lus (piv txwv li cis) thaum lub anti ntxiv yog thaum lawv txuas rau sab nraud ntawm daim ntawv cog lus (trans).
Kuj Paub, qhov txawv ntawm syn thiab anti ntxiv yog dab tsi? Syn thiab anti ntxiv xa mus rau lub ntsej muag ntawm lub pi daim ntawv cog lus ob pawg yuav ntxiv. Thaum ob lub atoms / pawg ntxiv rau tib lub ntsej muag nws tau txiav txim siab sib ntxiv . Thaum lawv ntxiv rau cov ntsej muag sib txawv nws tau txiav txim siab anti ntxiv.
Dhau li ntawd, puas yog electrophilic ntxiv syn lossis anti?
Hauv cov tshuaj tiv thaiv 1 thiab 3 cov ntsiab lus ntawm HCl ntxiv rau sab nraud ntawm ob daim ntawv cog lus. Qhov no hu ua anti ntxiv . Lub stereochemistry ntawm cov tshuaj tiv thaiv 4 kuj yog tiv thaiv . Hauv cov tshuaj tiv thaiv 5 cov ntsiab lus ntawm deuterated acetic acid ntxiv rau tib sab ntawm ob daim ntawv cog lus hauv dab tsi yog hu ua sib ntxiv.
Puas yog halogen ntxiv syn lossis anti?
Lwm cov tshuaj tiv thaiv tsuas yog tsim syn cov khoom, xws li thaum hydrogen ntxiv rau alkene. Thaum kawg, qee qhov kev xav, xws li cov ntxiv ntawm halogens rau alkenes, yuav tsim xwb tiv thaiv cov khoom. Los ntawm kev suav nrog stereochemistry ntawm cov tshuaj tiv thaiv, peb tau piav qhia zoo dua qhov khoom tsim tau tiag tiag.
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Puas yog tus nplaig dov txuas ntxiv lossis tsis txuas ntxiv?
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