Cov txheej txheem:
- Cov tshuaj tsw qab nyob qhov twg ntawm NMR?
- Koj paub cov tshuaj tsw qab li cas?
- Cov tshuaj tsw qab nyob qhov twg?
- Puas hu ua aromatic system?
Video: Cov tshuaj tsw qab nyob qhov twg?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Aromatic hydrocarbons qhia kev nqus hauv thaj tsam 1600-1585 cm-1 thiab 1500-1400 cm -1 vim cov roj carbon-carbon stretching vibrations hauv lub nplhaib aromatic.
Cov tshuaj tsw qab nyob qhov twg ntawm NMR?
Spectroscopy Tutorial: Aromatics
Alkyl pawg qhia mus rau sab xis ntawm 3000, aromatic C–H stretches rau sab laug ntawm 3000. Aromatic protons tshwm sim los ntawm 6.5-8.5 hli Benzylic protons yog los ntawm 2-3 ppm.
Koj paub cov tshuaj tsw qab li cas?
A molecule yog aromatic thaum nws ua raws li 4 lub ntsiab lus tseem ceeb:
- Lub molecule yuav tsum yog planar.
- Lub molecule yuav tsum yog cyclic.
- Txhua lub atom hauv lub nplhaib uas muaj ntxhiab yuav tsum muaj p orbital.
- Lub nplhaib yuav tsum muaj pi electrons.
Cov tshuaj tsw qab nyob qhov twg?
Cov tshuaj muaj ob lub nplhaib benzene koom ua ke, xws li naphthalene, kuj pom muaj nyob rau hauv cov roj crude, txawm hais tias lawv tsis tshua muaj ntau dua li cov tshuaj benzene. Aromatic hydrocarbons muaj ntau dua hauv theedua li hauv roj av, tab sis hauv Tebchaws Meskas lawv feem ntau yog tsim los ntawm tom kawg.
Puas hu ua aromatic system?
Ib qho tshuaj tsw qab (los yog aryl) lub nplhaib muaj cov txheej txheem sib khi atoms nrog cov yam ntxwv tshwj xeeb: Lub kaw lus delocalized conjugated π, feem ntau yog ib qho kev sib hloov ntawm ib qho thiab ob daim ntawv cog lus. Coplanar qauv, nrog rau tag nrho cov pab atoms nyob rau hauv tib lub dav hlau. Kev koom tes atoms teem rau hauv ib lossis ntau dua…
Pom zoo:
Thaum twg cov tshuaj tsw qab siv nyob rau hauv lub tsev teev ntuj catholic?
Tswb yuav siv tau rau hauv kev pe hawm Vajtswv ntawm kev ua koob tsheej ntawm Eucharist, ntawm kev ua koob tsheej ntawm Divine Office, tshwj xeeb ntawm Solemn Vespers, ntawm Solemn Evensong, ntawm lub ntees tuag, kev txais tos thiab nthuav tawm ntawm Eucharist, kev fij ntawm lub tsev teev ntuj lossis thaj chaw thiab ntawm lwm yam kev pabcuam .
Vim li cas kuv hws tsw tsw tsw tsw?
Thaum tib neeg tawm hws, cov kua tuaj yeem sib xyaw nrog cov kab mob ntawm daim tawv nqaij thiab ua rau muaj ntxhiab tsw tsw. Txoj hauv kev zoo tshaj los zam qhov no yog ua kom thaj chaw cuam tshuam kom huv si thiab qhuav. Qee lub sij hawm, kev hloov ntawm tsw yuav tshwm sim los ntawm qhov teeb meem kev noj qab haus huv .
Cov khoom qab zib liab nyob rau hauv cov khoom qab zib nyob qhov twg?
Cov Candies liab tsuas yog muaj nyob rau qib nrog 5 lossis 6 xim. Yog li ntawd lawv tsis tshwm sim rau txhua qib. Qhov ntau xim cov qib muaj, qhov nyuaj nws feem ntau yog. Nyob zoo @BBehr . Qib nyuaj tshaj hauv Candy Crush yog dab tsi?
Cov ntaub pua plag puas tsw tsw tsw?
Dampness lossis Moisture Thaum cov dej noo nkag hauv qab cov ntaub pua plag, cov ntxhiab tsw phem yuav tsim. Thaum cov ntaub pua plag tsw tsw tsw, lossis tsw tsw zoo li pwm, nws tuaj yeem yog qhov tshwm sim ntawm cov av noo los yog nchuav uas poob rau ntawmcov ntaub pua plag.
Puas cov tshuaj tsw qab noj tshuaj ua haujlwm?
Q: Cov tshuaj tsw qab-Eaters zoo li cas hauv kev kho thiab tiv thaiv tus neeg ncaws pob ko taw? A: Ntxiv nrog rau kev muab cov ntxhiab tsw zoo tshaj thiab kev tswj kom ntub dej, Cov tshuaj tsw qab-Eaters yog qhov zoo ntawm kev tiv thaiv thiab kho tus neeg ncaws pob ua cov tshuaj tiv thaiv kab mob ib leeg .
