Ua ntej, aldehydes yog cov reactive reactive electrophiles ntau dua li ketones, thiab formaldehyde yog reactive dua li lwm yam aldehydes. … Lub aldol condensation ntawm ketones nrog aryl aldehydes los ua α, β-unsaturated derivatives hu ua Claisen-Schmidt cov tshuaj tiv thaiv.
Puas ketone muab aldol condensation?
Aldehyde lossis ketone uas muaj alpha hydrogen reacts nrog rau cov hauv paus muaj zog xws li NaOH, KOH thiab Ba(OH) 2 thiab muab aldol raws li cov khoom. Cov tshuaj tiv thaiv no ua rau ob npaug ntawm cov pa roj carbon atom ntawm thawj aldehyde lossis ketone. Kom lub cev qhuav dej ntawm aldol compound, nws yog rhuab ib leeg los yog nrog I2.
Puas ketones ua aldol cov tshuaj tiv thaiv?
'Aldol' yog cov ntawv luv ntawm aldehyde thiab cawv. Thaum lub enolate ntawm ib qho aldehyde los yog ketone reacts ntawm α-carbon nrog cov carbonyl ntawm lwm cov molecule nyob rau hauv lub hauv paus los yog acidic tej yam kev mobkom tau β-hydroxy aldehyde los yog ketone, cov tshuaj tiv thaiv no hu ua Aldol Teb.
Yuav ua li cas hom aldehydes thiab ketones tau txais aldol condensation?
Txhua tus aldehydes muaj α-hydrogenundergo Aldol condensation.
Yuav ua li cas thiaj tsis dhau aldol condensation?
Cov tshuaj carbonyl yuav tsum muaj α- hydrogen atom kom nkag mus rau aldol condensation. Yog li, propanal thiab ethanal yog cov aldehydes uas tuaj yeem ua rau aldol condensation. … Yog li, aldehydes uas tsis dhau aldol condensation yog trichloroethanal, benzaldehydethiab methanal.
