Cov tshuaj tiv thaiv Cannizzaro, muaj npe tom qab nws tus neeg nrhiav pom Stanislao Cannizzaro, yog cov tshuaj tiv thaiv tshuaj uas cuam tshuam nrog base-induced disproportionation ntawm ob lub molecules ntawm cov tsis-enolizable aldehydelos muab thawj. cawv thiab carboxylic acid.
Puas aldol yog qhov tsis txaus ntseeg?
Aldol condensation yog ib qho tshuaj lom neeg cov tshuaj tiv thaiv nyob rau hauv uas ib qho enol lossis enolate ion reacts nrog carbonyl compound muab ib tug conjugated enone thaum Cannizzaro cov tshuaj tiv thaiv yog cov organic redox cov tshuaj tiv thaiv nyob rau hauv uas disproportionation ntawm aldehydes muabcarboxylic acids thiab cawv.
Cov tshuaj tiv thaiv Cannizzaro yog dab tsi?
4) Hla Cannizzaro cov tshuaj tiv thaiv: Thaum sib xyaw ntawm formaldehyde thiab tsis yog enolizable aldehyde raug kho nrog lub hauv paus muaj zog, tom kawg yog qhov tshwj xeeb txo rau cawv thaum formaldehyde yog oxidized rau formic acid. Qhov kev hloov pauv no hu ua Cross Cannizzaro cov tshuaj tiv thaiv.
Puas yog cov tshuaj tiv thaiv Cannizzaro thim rov qab?
Mechanism of the Cannizzaro Reaction
Thawj kauj ruam ntawm lub tshuab yog rov qab nucleophilic ntxiv ntawm hydroxide ion rau carbonyl pawg ntawm aldehyde. Qhov no yog qhov sib piv rau thawj kauj ruam hauv kev tsim cov hydrate hauv cov xwm txheej yooj yim.
Puas yog Cannizzaro cov tshuaj tiv thaiv yog ib qho piv txwv ntawm cov tshuaj tiv thaiv redox?
- Cannizzaro cov tshuaj tiv thaiv yog ib qho uas ob lub moles ntawm tib aldehyde reacts nyob rau hauv lub xub ntiag ntawm lub hauv paus muabcawv thiab ntsev uas tuaj yeem hydrolysed kom muab cov kua qaub. … Yog li, cov txheej txheem ntawm oxidationthiab txo qis hauv ib kauj ruam yog hu ua redox tshuaj tiv thaiv. Yog li, cov lus teb raug yog "Option A".