Lithium aluminium hydride tsis txo cov alkenes yooj yim lossis arenes. Alkynes tsuas yog txo yog tias ib pawg cawv nyob ze. Nws tau pom tias LiAlH4 txo qis ob daim ntawv cog lus hauv N-allylamides.
Vim li cas thiaj LiAlH4 txo alkenes?
LiAlH4 yog ib qho nyuaj nucleophilic reductant (HSAB Txoj Cai) uas txhais tau hais tias nws cuam tshuam nrog electrophiles, thiab alkenes tsis yog electrophiles. Qhov laj thawj tseem ceeb yog Al xav tau tshem nws cov hydride. … Tab sis cov pa roj carbon monoxide rau cov cawv tsis tuaj yeem ua rau hydride.
LAH puas txo tau ob daim ntawv cog lus?
Lithium aluminium hydride, LAH reagent tsis tuaj yeem txo qhov kev sib cais tsis-polar ntau daim ntawv cog lus zoo li C=C. Txawm li cas los xij, ob lossis triple daim ntawv cog lus hauv kev sib txuas nrog lub ncov qaumteb qab teb ntau daim ntawv cog lus tuaj yeem txo.
LAH txo dab tsi?
Lithium aluminium hydride
LiAlH4 yog ib qho muaj zog, tsis muaj kev xaiv txo tus neeg sawv cev rau ob daim ntawv cog lus, feem ntau yooj yim xav tias yog qhov chaw ntawm H-. Nws yuav txo aldehydes, ketones, esters, carboxylic acid chlorides, carboxylic acids thiab txawm carboxylate ntsev rau cawv.
LAH puas tib yam li LiAlH4?
Illustrated Glossary of Organic Chemistry - Lithium aluminium hydride (LiAlH4; LAH) Lithium aluminium hydride (LiAlH4; LAH): A hydride qhov chaw siv feem ntau los txo cov carbonyl compounds. … Lithium aluminium hydride txo cov ketone rau cov cawv thib ob. Lithium aluminium hydride txo cov ester rau ob qho cawv.
