2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Teb: Cov molecule ntawm glycerol muaj ob pawg thawj cawv (-OH) thiab ib pawg cawv thib ob (-OH) yog li nws qhia cov yam ntxwv ntawm cov cawv thawj thiab theem nrab. Thawj pawg -OH pawg muaj ntau dua reactive dua pawg -OH pawg.
Puas muaj pes tsawg pawg thawj thiab theem nrab hydroxyl muaj nyob hauv glycerine?
qauv, glycerine muaj ob thawj thiab ib pawg thib ob hydroxyl.
pab pawg twg muaj nyob hauv glycerine?
Qhia: Glycerine paub tias yog polyol compound, uas txhais tau tias nws muaj ntau dua ib pawg hydroxyl. Nws muaj tag nrho ntawm peb pawg hydroxyl txuas rau nws. Ua kom tiav cov kauj ruam los ntawm kev daws teeb meem: - Glycerine hu ua glycerol vim nws muaj peb pawg hydroxyl hauv nws cov mis molecular.
Puas glycerol muaj pab pawg OH?
Glycerol (tseem hu ua glycerine) yog cov khoom qab zib qab zib nrog peb cawv hydroxyl pawg.
Cov pab pawg ua haujlwm dab tsi muaj nyob hauv glycerol?
Cov qauv molecular ntawm glycerol muaj peb cov carbons txuas rau peb pawg hydroxyl. Cov organic ua haujlwm pab pawg uas glycerol belongs rau cawv ua haujlwm pab pawg.
Pom zoo:
Nyob rau hauv beckmann rearrangement uas pab pawg migrates?
Kev hloov pauv ntawm acetone oxime hauv cov tshuaj Beckmann koom nrog peb acetic acid molecules thiab ib qho proton (tam sim no raws li oxonium ion). Nyob rau hauv lub xeev hloov pauv ua rau lub iminium ion (σ-complex),pawg methyl tsiv mus rau nitrogen atom hauv kev sib koom ua ke raws li pawg hydroxyl raug tshem tawm.
Nyob hauv ib pab pawg abelian txhua pawg sub yog?
Txhua pab pawg ntawm pawg neeg abelian yog ib txwm, yog li txhua pab pawg ua rau nce mus rau ib pawg neeg. Subgroups, quotients, thiab ncaj qha sums ntawm abelian pawg yog dua abelian. Cov pab pawg abelian yooj yim kawg nkaus yog cov pab pawg cyclic ntawm kev txiav txim thawj zaug.
Vim li cas thiaj muaj cov tub rog dub nyob hauv qhov ntxa uas tsis muaj tseeb?
"Untended Graves yog tiag tiag pib ntawm kev txiav theem uas mus tag nrho txoj kev mus rau Ntsuj Plig ntawm Cinder los ntawm kev puas tsuaj ntawm qhov hluav taws kub thiab sab phab ntsa ", tus neeg sim piav qhia. Qhov no, lawv hais tias, yog "
Puas pab pawg pab pawg txhawb nqa pawg?
khoom plig stacks txhua lub sijhawm. Tam sim no, thaum koj qhib MyPlayer nav, nco ntsoov xyuas nrog koj cov xwm txheej. Feem ntau koj tsis tas yuav ua dab tsi kom tau txais koj VC los ntawm lawv, tab sis nws yuav pab tau rau hauv cov ntaub ntawv.
Puas muaj tej pab pawg neeg uas tsis muaj kev vam meej?
Muaj kwv yees li 350 tus tswv cuab, thiab 100 ntawm lawv tsis muaj kev sib cuag nrog lub ntiaj teb sab nraud. Lawv yog xav tias muaj kev phom sij heev vim kev tsis sib haum xeeb nrog kev txiav txim siab txiav txim siab hauv lawv thaj chaw. Puas muaj ib pab pawg tsis tau pom dua?
