Video: Puas yog KMnO4 hnov mob nrog alkanes?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum ib tug ntshav daws ntawm oxidizing tus neeg sawv cev KMnO4 Ntxiv rau alkene, alkene yog oxidized rau diol thiab cov KMnO4 hloov mus rau xim av MnO2. Alkanes thiab aromatic compounds ua tsis yog teb nrog poov tshuaj permanganate.
Ua raws li qhov no, vim li cas alkanes tsis hnov mob nrog KMnO4?
Alkanes , vim tias muaj tsuas yog sigma bonds thiab tsis muaj pi bonds, yog heev ruaj khov thiab li no tsis hnov mob nrog KMnO4 . Alkenes yog nkag oxidised los ntawm txias dilute nruab nrab los yog alkaline KMnO4 tshuaj muab vicinal lossis 1, 2-glycols thaum KMnO4 yog nws tus kheej txo mus rau MnO2.
Ib sab saum toj, puas hexane hnov mob nrog KMnO4? Permanganate ion (MnO4-) reacts nrog carbon-carbon ob daim ntawv cog lus (C = C ob daim ntawv cog lus). Limonene muaj kev cai, ua tiav C = C ob daim ntawv cog lus. Ntawm qhov tod tes, hexane yog ib qho piv txwv ntawm "saturated" hydrocarbon, thiab tsis muaj C = C ob daim ntawv cog lus. Yog li, limonene thiab benzene, tab sis tsis yog hexane yuav teb nrog MnO4-.
Ntawm no, KMnO4 ua dab tsi rau alkanes?
Oxidation ntawm aromatic alkanes nrog KMnO4 muab carboxylic acids. Nqe lus piav qhia: Kev kho mob ntawm alkylbenzene nrog poov tshuaj permanganate ua rau oxidation muab benzoic acid. Lus Cim: Txoj hauj lwm ncaj qha nyob ib sab ntawm ib pawg uas muaj ntxhiab hu ua "benzylic" txoj hauj lwm.
Puas yog ketone hnov mob nrog KMnO4?
KMnO4 kuj oxidizes phenol rau para-benzoquinone. Exhaustive oxidation ntawm cov organic molecules los ntawm KMnO4 yuav mus txog thaum tsim cov carboxylic acids. Yog li ntawd, cawv yuav oxidized rau carbonyls (aldehydes thiab ketones ), thiab aldehydes (thiab qee yam ketones , raws li hauv (3) saum toj no) yuav yuav oxidized rau carboxylic acids.
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