2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Thaum tsis muaj peroxide, HBr ntxiv rau propene los ntawm cov txheej txheem ionic (nrog rau carbocation intermediate) muab 2-bromopropane. Markovnikov txoj cai yog ua raws.
Yuav ua li cas thaum propene reacts nrog HBr nyob rau hauv muaj peroxide?
Thaum $HBr$ reacts nrog propene nyob rau hauv lub xub ntiag ntawm peroxide raws li catalyst nws ua rau tsim ntawm $n-$ propyl bromide. Qhov no yog anti-markovnikov ntxiv cov tshuaj tiv thaiv. Thaum cov dawb radicals teb nrog hydrogen bromide, nws rho tawm hydrogen los ntawm hydrogen bromide thiab muab bromine radical.
Dab tsi yog cov khoom ntawm peroxide ntxiv ntawm HBr rau propene?
Ntxiv ntawm HBr rau propene yields 2-bromopropane, thaum nyob rau hauv muaj benzoyl peroxide, tib cov tshuaj tiv thaiv yields 1-bromopropane. Piav thiab muab mechanism. Cov lus qhia: Nws pom tias qhov sib ntxiv ntawm HBr rau propene yields 2-bromopropane raws li Markovnikov txoj cai.
Qhov twg yog cov khoom loj tsim thaum propene reacts nrog HBr thaum tsis muaj peroxides?
Methyl bromide rau ethyl bromide
Yuav ua li cas thaum propene reacts nrog HBr?
yuav ua li cas thaum propene kho nrog hbr? Propene reacts nrog HBr thiab produce CH 3CHBrCH3 (2-bromopropane). Nws yog ib qho alkyl haalide compound thiab qhov kev rov ua dua no yog kev rov ua dua ntxiv. Tsis tas li, koj tuaj yeem kho HBr nyob rau hauv muaj cov organicperoxides hloov qhov chaw uas bromine atom yog sib koom.
Pom zoo:
Ntxiv ntxiv ntxiv ntxiv lawm?
Ntxiv mus yog nce qib nce los ntawm ntxiv. Tsis tas li ntawd yog qhov yooj yim ntxiv, ntxiv yog ntxiv thiab ua kom muaj kev sib cav, qhov ntxiv yog ntxiv, nce kev sib cav, thiab qhia tias qhov laj thawj ntxiv yog qhov sib txawv dua li qhov laj thawj yav dhau los.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Vim li cas qhov tseem ceeb ntawm qhov muaj zog thiab qhov tsis muaj zog yog qhov tseem ceeb?
Nws yog ib qho tseem ceeb rau qhov tseem ceeb ntawm qhov ua tau zoo thiab qhov tsis muaj zog vim qhov no pab lub tuam txhab txiav txim siab txog thaj chaw uas lawv yuav tsum tau txhim kho ntxiv rau thaj chaw uas lawv ua tau zoo hauv. Vim li cas lub zog thiab qhov tsis muaj zog tseem ceeb?
Dab tsi yog qhov sib npaug ntawm kab rau kev sib raug zoo tsis sib haum?
Thaum nws los txog rau kev teeb tsa kev sib raug zoo tsis sib xws, nws yuav pab tau kom paub txog ob peb yam ntxwv ntawm kab zauv y=mx + b. Hauv kab zauv no, m yog sib npaug rau txoj kab nqes. Yuav ua li cas yog qhov sib npaug ntawm kev sib raug zoo?
Puas muaj leej twg tau mus rau hauv qab ntawm qhov sib tw sib sib zog nqus?
Thaum ntau txhiab tus neeg nce toj tau ua tiav Mount Everest, qhov chaw siab tshaj plaws hauv ntiaj teb, tsuas yog ob tus neeg tau nqis mus raulub ntiaj teb qhov chaw tob tshaj plaws, Challenger Deep hauv Dej Hiav Txwv Pacific Mariana Trench.
