Video: Vim li cas NaH yog lub hauv paus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Acid- Puag Cim
Rau cov molecule nrog H-X daim ntawv cog lus los ua cov kua qaub, cov hydrogen yuav tsum muaj tus lej oxidation zoo yog li nws tuaj yeem ionize los tsim ib qho zoo +1 ion. Piv txwv li, hauv sodium hydride ( NaH ) cov hydrogen muaj ib tug nqi -1 yog li nws tsis yog ib tug acid tab sis nws yog tiag tiag a puag.
Hauv qhov no, NaH puas yog lub hauv paus zoo?
Qhov no alkali hlau hydride feem ntau yog siv los ua ib tug muaj zog tseem combustible puag hauv cov organic synthesis. NaH yog tus sawv cev ntawm saline hydrides, lub ntsiab lus nws yog ntsev zoo li hydride, muaj li ntawm Na+ thiab H− ions, nyob rau hauv sib piv rau ntau molecular hydrides xws li borane, methane, ammonia thiab dej.
Tsis tas li ntawd, yog NaH lub hauv paus lossis nucleophile? Nrog rau tag nrho cov nqi tsis zoo nyob rau hauv ib qho oxygen atom, nws muaj zog puag , tab sis cov steric bulk los ntawm pawg methyl ua rau t-butoxide ib qho tsis zoo nucleophile . Lwm yam uas tsis yog- nucleophilic puag suav nrog NaH , LDA, thiab DBU. Lub conjugate hauv paus ntawm cov ntxhia acids ua kom zoo nucleophiles , tab sis txaus ntshai hauv paus.
Kuj paub yog, vim li cas sodium hydride yog lub hauv paus?
Sodium muaj qhov txo qis electronegativity (≈1.0) dua li hydrogen (≈2.1) txhais tau tias hydrogen rub electron ceev ntawm nws tus kheej, deb ntawm sodium tsim ib sodium cation thiab a hydride anion. A hydride Nws zoo dua piav raws li H- thiab muaj ib khub dawb. Yog li ntawd, nws yog Brønsted puag , tsis yog acid.
NaH yog dab tsi hauv chemistry?
Sodium hydride yog ib qho reactive inorganic hydride uas siv los ua lub hauv paus muaj zog. Formula thiab Structure: The tshuaj formula ntawm sodium hydride yog NaH , thiab nws cov molar loj yog 24.0 g / mol.
Pom zoo:
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