aryl halides … diazonium ions tau npaj los ntawm diazotization, txheej txheem uas cov tshuaj tsw qab amine (ArNH 2) tau kho nrog qhov chaw ntawm nitrous acid Nitrous acid Nitrous acid , (HNO2), ib qho tsis ruaj khov, tsis muaj zog acidic compound uas tau npaj tsuas yog hauv daim ntawv txias, dilute daws. Nws yog ib qho tseem ceeb hauv chemistry hauv kev hloov amines rau hauv diazonium tebchaw, uas yog siv los ua azo dyes. https://www.britannica.com › science › nitrous-acidY
Nitrous acid | chemical compound | Britannica
(HNO2) . Feem ntau qhov no suav nrog ntxiv sodium nitrite (NaNO2) rau cov kua qaub aqueous uas muaj cov amine.
Thaum twg tshuaj tsw qab amine tseem ceeb?
(c) Sandmeyer cov tshuaj tiv thaiv Thaum thawj cov tshuaj tsw qab amine, yaj lossis raug tshem tawm hauv cov dej txias aqueous ntxhia acid, kho nrog sodium nitrite, diazonium ntsev yog tsim (Teb 13. Chav Kawm XII).
Thaum thawj cov tshuaj tsw qab yog kho nrog nano2?
Thaum thawj cov tshuaj tsw qab amine raug kho nrog NaNO_(2) + HCI ntawm 0^(@)-5^(@)C, diazonium ntsev yog tsim thiab cov tshuaj tiv thaiv hu ua diazo cov tshuaj tiv thaiv. Nyob rau hauv cov tshuaj tiv thaiv mineral acid yuav tsum tau ntxiv los tiv thaiv coulping cov tshuaj tiv thaiv ntawm diazonium ntsev nrog ntau tshaj aryl amine.
Dab tsi yog diazotization cov tshuaj tiv thaiv ntawm amine?
txheej txheem ntawm hloov pauv ntawm thawjaromatic amines rau hauv nws cov ntsev diazonium yog hu ua diazotization. Diazonium ntsev yog cov khoom nruab nrab tseem ceeb uas tuaj yeem ua rau muaj kev sib txuas ua ke los tsim cov azo dyes thiab cov tshuaj electrophilic hloov pauv los qhia cov pab pawg ua haujlwm.
Yuav ua li cas ntsev yog siv rau diazotization ntawm aromatic amines?
Cov nitrosation ntawm thawj amines aromatic nrog nitrous acid (tsim nyob rau hauv situ los ntawm sodium nitrite thiab ib tug muaj zog acid, xws li hydrochloric acid, sulfuric acid, los yog HBF 4) ua rau diazonium ntsev, uas tuaj yeem cais tau yog tias qhov kev tawm tsam tsis yog nucleophilic.
