Conjugation cuam tshuam li cas rau stability?
Conjugation cuam tshuam li cas rau stability?

Video: Conjugation cuam tshuam li cas rau stability?

Video: Conjugation cuam tshuam li cas rau stability?
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Conjugation tshwm sim thaum p orbital ntawm peb lossis ntau dua atoms uas nyob ib sab ua tau sib tshooj Conjugation nyiam stabilize molecules. Allylic carbocations yog ib qho sib txuas qhov system. Tus nqi zoo ntawm carbocation yog muaj nyob rau hauv P orbital ntawm ib sp2 hybrizied carbon. Qhov no tso cai rau sib tshooj nrog ob daim ntawv cog lus.

Hais txog qhov no, yog vim li cas conjugation nce stability?

Hauv chemistry, a sib txuas qhov system yog ib qho kev sib txuas ntawm p orbitals nrog delocalized electrons nyob rau hauv ib lub molecule, uas feem ntau txo qis tag nrho lub zog ntawm cov molecule thiab nce stability . Lawv tso cai rau ib tug delocalization ntawm π electrons nyob rau hauv tag nrho cov nyob ib sab aligned p orbitals.

Tom qab ntawd, lo lus nug yog, dab tsi yog qhov cuam tshuam ntawm kev sib txuas hauv UV spectroscopy? Cov nyhuv ntawm conjugation (alternating ob daim ntawv cog lus nyob rau hauv ib tug molecule) yog mus cuag lub pi-cloud ntawm electrons nyob rau hauv tag nrho ntev ntawm lub sib txuas atoms. Qhov no txo qis lub zog rau lub teeb nqus qhov siab tshaj plaws (hloov mus rau qhov ntev nthwv dej-ntev lossis qis dua).

Tom qab ntawd, ib tug kuj yuav nug, yuav ua li cas conjugation cuam tshuam reactivity?

Conjugation yog sib tshooj ntawm p orbitals hauv cov atoms nyob sib ze sib cais los ntawm sigma daim ntawv cog lus, ua rau delocalization ntawm p electrons. Delocalization txo tag nrho lub zog ntawm lub cev. Tsawg zog, siab dua yog qhov ruaj khov, thiab qis dua yog qhov reactivity.

Kev sib txuas yog dab tsi?

Conjugation yog qhov kev hloov pauv uas tshwm sim nyob rau hauv ib qho kev qhia los qhia txog kev nruj, kev xav, tus neeg thiab lwm yam. Hauv lus Askiv, verbs hloov raws li lawv tau siv, tshwj xeeb tshaj yog nrog cov neeg sib txawv (koj, kuv, peb) thiab sijhawm sib txawv (tam sim no, tom qab, ua ntej). Conjugating verbs tseem ceeb txhais tau tias hloov lawv mus rau hauv ntau hom los muab cov ntsiab lus.

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