2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Gomberg cov tshuaj tiv thaiv yuav xa mus rau: Gomberg-Bachmann cov tshuaj tiv thaiv, cov tshuaj tiv thaiv aryl-aryl coupling ntawm diazonium ntsev. Gomberg-Free radical cov tshuaj tiv thaiv, cov tshuaj tiv thaiv uas triphenylmethyl radical tau npaj los ntawm kev kho triphenylmethyl chloride nrog a hlau zoo li Nyiaj lossis Zinc nyob rau hauv muaj cov diethyl ether lossis benzene.
Biphenyl npaj Gomberg cov tshuaj tiv thaiv li cas?
Lub arene compound 1 (ntawm no benzene) yog txuas nrog lub hauv paus nrog diazonium ntsev 2 mus rau biaryl 3 los ntawm qhov nruab nrab aryl radical. Piv txwv li, p-bromobiphenyl tuaj yeem npaj los ntawm 4-bromoaniline thiab benzene: BrC 6 H 4 NH 2 + C6H6 → BrC6H 4-C6H.
Pschorr nplhaib kaw yog dab tsi?
Cov tshuaj tiv thaiv Pschorr yog classical nplhaib kaw txheej txheem rau kev tsim cov tshuab polycyclic uas ob lub aryl moieties tau koom ua ke. Nws sawv cev rau tus choj uas txuas diazonium ion chemistry nrog PAH synthesis.
pawg diazonium yog dab tsi?
Diazonium tebchaw los yog diazonium ntsev yog ib pawg ntawm cov organic tebchaw sib koom ib pawg ua haujlwm R−N + 2 X − qhov twg R tuaj yeem yog pawg organic, xws li alkyl lossis aryl, thiab X yog ib qho inorganic lossis organic anion, xws li halogen.
Vim li cas diazonium ntsev tsis ruaj khov?
Kev ruaj ntseg ntawm diazonium ntsev - txhais
Qhov tsis ruaj khov ntawm alkanediazonium ntsevyog vim lawv txoj kev nyiam tshem tawm qhov tshwj xeeb ruaj khov molecule ntawm nitrogen los tsim cov carbocations i.e, aliphaticdiazoniums altR-N≡NX−→ AlkylcarbocationR++ N≡N + X−.
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Cov tshuaj tiv thaiv dab tsi rau kev txhaj tshuaj tiv thaiv thib ob?
Cov tshuaj tiv thaiv COVID-19 thib ob yog dab tsi? Cov kev mob tshwm sim feem ntau tom qab koob thib ob yog qhov mob ntawm qhov chaw txhaj tshuaj (92.1% tshaj tawm tias nws kav ntev dua 2 teev); qaug zog (66.4%); mob lub cev lossis leeg nqaij (64.
Puas yog lub cev tiv thaiv kab mob hauv lub cev puas tsim cov tshuaj tiv thaiv?
Lub cev tiv thaiv kab mob tau txais, nrog kev pab los ntawm lub cev hauv lub cev, tsim cov hlwb (tshuaj tiv thaiv kab mob) los tiv thaiv koj lub cev los ntawm ib tus neeg invader tshwj xeeb. Cov tshuaj tiv thaiv no yog tsim los ntawm cov hlwb hu ua B lymphocytes tom qab lub cev tau raug rau cov neeg ua phem.
Vim li cas cov tshuaj tiv thaiv combustion yog cov tshuaj tiv thaiv oxidation?
Kev sib xyaw ua ke ib txwm ua rau muaj oxygen lossis huab cua. … Hauv combustion cov tshuaj tiv thaiv oxygen yog ua ke nrog cov roj qhov chaw feem ntau carbon thiab hydrogen raws li ua rau carbon dioxide thiab dej thiab yog li qhov no yog cov tshuaj tiv thaiv oxidation.
Cov tshuaj twg yog cov tshuaj uas tsis yog tshuaj tiv thaiv inflammatory analgesic?
Txhua yam koj yuav tsum paub txog NSAIDs. Nonsteroidal anti-inflammatory tshuaj (NSAIDs) yog cov tshuaj uas txo qis lossis txo qhov mob. Cov piv txwv nrov tshaj plaws ntawm cov tshuaj hauv pawg no yog aspirin thiab ibuprofen. NSAIDs tuaj nyob rau hauv lub ntsiab lus dav ntawm non-opioid analgesics.
