Qhov sib txawv tseem ceeb ntawm oxidative thiab reductive ozonolysis yog oxidative ozonolysis muab carboxylic acids los yog ketones ua khoom, whereas reductive ozonolysis muab cawv los yog carbonyl compounds.
Ozonolysis yog cov tshuaj lom neeg cov tshuaj tiv thaiv uas tsis muaj tshuaj lom neeg cov ntaub ntawv raug cleaved siv ozone. Ntawm no, cov reactant molecules yog alkenes, alkynes, los yog azo compounds. Nyob ntawm cov khoom pib, cov khoom kawg sib txawv; e.g. Yog hais tias cleavage tshwm sim nyob rau hauv alkenes los yog alkynes, qhov kawg khoom yog ib tug carbonyl compound. Ozonolysis tuaj yeem ua tau ob txoj hauv kev ua oxidative ozonolysis thiab txo qis ozonolysis. Txawm li cas los xij, txoj hauv kev tshaj plaws yog txo qis ozonolysis.
Oxidative Ozonolysis yog dab tsi?
Oxidative ozonolysis yog txheej txheem ntawm oxidatively cleaving unsaturated bonds nyob rau hauv lub xub ntiag ntawm ozone. Ozone yog reactive allotrope ntawm oxygen. Thiab, cov tshuaj tiv thaiv tshuaj no suav nrog ob daim ntawv cog lus lossis triple bonds ntawm covalently bonded carbon atoms hauv cov organic tebchaw. Qhov ob lossis triple daim ntawv cog lus yog hloov los ntawm oxygen, tsim carbonyl compounds. Tsis tas li ntawd, oxidative ozonolysis yog qhov tseem ceeb hauv kev txheeb xyuas cov alkenes tsis paub.
Daim duab 01: Ob Txoj Kev ntawm Ozonolysis
Ntxiv mus, ozonolysis tuaj yeem pom raws li cov txheej txheem ntuj tsim. Cov khoom kawg ntawm oxidative ozonolysis yog carboxylic acid. Thaum xav txog cov txheej txheem ntawm oxidative ozonolysis, thawj kauj ruam yog qhov sib ntxiv ntawm ozone rau cov ntawv cog lus unsaturated. Nyob ntawd, cov pi electrons nyob rau hauv daim ntawv cog lus unsaturated ua raws li cov nucleophile thiab ozone yog cov electrophile. Thaum ib qho electrophile tawm tsam ib qho chaw, qhov thib ob carbon-oxygen daim ntawv cog lus nyob rau lwm qhov kawg ntawm ob daim ntawv cog lus. Tom qab ntawd, kev kho dua tshiab tshwm sim los tsim cov khoom ruaj khov. Cov khoom no yog ozonide uas tom qab ntawd decomposes rau hauv ketone thiab carboxylic acid nyob rau hauv muaj hydrogen peroxide.
Kev txo qis Ozonolysis yog dab tsi?
Reductive ozonolysis yog ib qho tshuaj lom neeg cov tshuaj tiv thaiv uas tsis muaj cov ntawv cog lus cleave reductively. Hom ozonolysis no muab cawv thiab carbonyl compounds ua cov khoom kawg. Txawm hais tias ozone yog cov oxidant zoo, cov txheej txheem txo qis kuj ua tau nrog ozonolysis. Hauv cov txheej txheem no, tus neeg sawv cev txo qis yog ntxiv rau cov tshuaj tiv thaiv sib tov; e.g. zinc hlau los yog dimethyl sulfide.
Feem ntau, qhov txo qis ozonolysis yog txoj hauv kev tshaj plaws ntawm kev rhuav tshem cov ntawv cog lus tsis txaus ntseeg. Nyob rau hauv kev sib piv rau reductive ozonolysis, ozonide tsim nyob rau hauv thawj kauj ruam yog decomposed los ntawm tus neeg saib xyuas (nyob rau hauv lub oxidative ozonolysis, cov khoom ozonide no yog cleaved los ntawm hydrogen peroxide). Thaum cov khoom pib ntawm reductive ozonolysis yog alkene, cov khoom yuav yog ib qho cawv los yog thiab aldehyde cov ntaub ntawv nrog rau ketone.
Qhov txawv ntawm Oxidative thiab Reductive Ozonolysis yog dab tsi?
Ozonolysis yog cov tshuaj lom neeg cov tshuaj tiv thaiv. Nws tuaj yeem tshwm sim hauv ob txoj hauv kev ua oxidative txoj kev thiab txoj kev txo qis. Oxidative ozonolysis yog txheej txheem ntawm oxidatively cleaving unsaturated bonds nyob rau hauv lub xub ntiag ntawm ozone. Reductive ozonolysis yog ib qho tshuaj lom neeg cov tshuaj tiv thaiv uas tsis muaj cov ntawv cog lus cleave reductively. Qhov sib txawv tseem ceeb ntawm oxidative thiab reductive ozonolysis yog tias oxidative ozonolysis muab carboxylic acids los yog ketones ua cov khoom, whereas reductive ozonolysis muab cawv los yog carbonyl compounds.
Cov hauv qab no qhia txog qhov sib txawv ntawm oxidative thiab reductive ozonolysis.
Summary – Oxidative vs Reductive Ozonolysis
Ozonolysis yog cov tshuaj lom neeg cov tshuaj tiv thaiv. Nws tuaj yeem tshwm sim hauv ob txoj hauv kev ua oxidative txoj kev thiab txoj kev txo qis. Qhov sib txawv tseem ceeb ntawm oxidative thiab reductive ozonolysis yog tias oxidative ozonolysis muab carboxylic acids los yog ketones ua cov khoom, whereas reductive ozonolysis muab cawv los yog carbonyl compounds.
