Video: Puas yog HBr yog radical?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho electrophilic bromine radical ntxiv rau alkene los tsim cov 2o radical.
| Tsis tu ncua | Radical | |
|---|---|---|
| Cov xwm txheej | HBr (dub, N2 huab cua) | HBr (Peroxides, UV teeb) |
| Hluav taws xob | H+ | Br. |
| Nruab nrab | carbocation | radical |
| Regioselectivity | Markovnikov | Anti-Markovnikov |
Tib neeg kuj nug, yog HBr yog markovnikov?
Vim lub HBr ntxiv rau "txoj kev tsis ncaj ncees lawm" nyob rau hauv lub xub ntiag ntawm cov organic peroxides, qhov no feem ntau hu ua cov nyhuv peroxide los yog anti- Markovnikov ntxiv. Thaum tsis muaj peroxides, hydrogen bromide ntxiv rau propene ntawm ib qho kev sib ntxiv ntawm electrophilic. Uas muab cov khoom kwv yees los ntawm Markovnikov tus thawj coj Txoj cai.
Tom qab, lo lus nug yog, puas yog radical ntxiv syn lossis anti? Dawb Radical Ntxiv Ntawm HBr Rau Alkenes Ua rau " Anti "Markovnikov" cov khoom. Hloov chaw Br xaus rau ntawm cov pa roj carbon ntau hloov ntawm alkene, nws xaus rau qhov tsawg kawg nkaus. [Lub stereochemistry ntawm cov tshuaj tiv thaiv, txawm li cas los xij, tsis hloov pauv: nws tseem muab qhov sib xyaw ntawm " syn "thiab" tiv thaiv "cov khoom.]
Kuj paub, yog HBr syn lossis anti?
HBr Ntxiv nrog Radical Yields 1-bromoalkene Syn Ntxiv rau 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 tiv thaiv ntxiv yog thaum lawv txuas rau sab nraud ntawm daim ntawv cog lus (trans).
HBr ua dab tsi rau alkene?
HBr Ntxiv rau ib Alkene . HBr ntxiv rau alkenes los tsim alkyl halides. Ib txoj hauv kev zoo los xav txog cov tshuaj tiv thaiv yog tias pi daim ntawv cog lus ntawm tus alkene ua raws li ib tug tsis muaj zog nucleophile thiab reacts nrog electrophilic proton ntawm HBr . Xwb, koj ua tau saib thawj kauj ruam ntawm cov tshuaj tiv thaiv raws li protonation ntawm pi daim ntawv cog lus.
Pom zoo:
Puas yog chlorine yog dawb radical?
Ib qho chlorine atom muaj ib qho hluav taws xob tsis sib xws thiab ua raws li cov dawb radical
Dab tsi yog lub voos xwmfab hauv paus ntawm 40 hauv daim ntawv radical?
Qhov tseem ceeb ntawm 40 uas peb tuaj yeem nqa lub voos xwmfab ntawm lub hauv paus yog 8. Peb tuaj yeem sau 40 li (8) (5) thiab tom qab ntawd siv cov khoom siv txoj cai ntawm radicals cais 2 tus lej. Peb tuaj yeem nqa lub voos xwmfab ntawm 8, uas yog 2, tab sis peb yuav tsum tau tawm ntawm 5 hauv qab lub voos xwmfab
Qhov txawv ntawm cov hauv paus hniav thiab radical yog dab tsi?
Hauv cov ntsiab lus | lej | lang = en cov ntsiab lus qhov sib txawv ntawm cov hauv paus thiab radical. yog lub hauv paus yog (arithmetic) lub hauv paus square (xav paub yog tias tsis muaj lub hwj chim tau teev tseg; nyob rau hauv cov ntaub ntawv twg, "lub hauv paus ntawm" yog feem ntau abbreviated rau "hauv paus") thaum radical yog (arthmetic) lub hauv paus (ntawm ib tug xov tooj los yog kom muaj nuj nqis)
Puas yog radical ntxiv syn lossis anti?
H-Br, yog li ntawd, tuaj yeem ua rau lub ntsej muag ntawm cov dawb radical [ceeb toom 2]. Yog tias nws tawm tsam tib lub ntsej muag raws 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 "anti"
Puas yog HBr yog Oxyacid?
Binary acids yog qee cov molecular tebchaw uas hydrogen ua ke nrog cov khoom thib ob uas tsis yog xim hlau; Cov kua qaub no suav nrog HF, HCl, HBr, thiab HI. HCl, HBr, thiab HI yog tag nrho cov muaj zog acids, whereas HF yog ib tug tsis muaj zog acid. Hydrochloric acid yog pom nyob rau hauv gastric acid. Nws yog ib tug tswv cuab ntawm binary acids