Qhov no tuaj yeem kwv yees hauv cov tshuaj tiv thaiv vim tias cov khoom hloov pauv hauv cov organic molecules muaj cov electron rho tawm lossis cov khoom siv hluav taws xob pub dawb..
Puas yog pab pawg tshem tawm electron nce nucleophilicity?
Nco ntsoov, cov pab pawg pub dawb electron tuaj yeem ua cov molecule ntau nucleophilic los ntawm kev tsim txiaj ntawm negative charge density ntawm nucleophilic atom.
Dab tsi yog qhov cuam tshuam ntawm electron tshem tawm pawg ntawm?
Ib pawg tshem tawm hluav taws xob (EWG) rub cov electrons tawm ntawm qhov chaw tawm tsam. Thaum lub chaw no yog ib qho hluav taws xob nplua nuj carbanion lossis alkoxide anion, lub xub ntiag ntawm cov khoom siv hluav taws xob rho tawm muaj cov nyhuv stabilizing.
Puas yog nucleophiles electron rho tawm?
Qhov no yog lub ntsiab txhais ntawm Lewis puag. Hauv lwm lo lus, nucleophiles yog Lewis hauv paus. Thaum lub nucleophile pub ib khub ntawm electrons rau ib tug proton (H+) nws hu ua Brønsted puag, los yog yooj yim, "base". … Raws li koj tau pom, nucleophiles txhua tus muaj khub ntawm cov hluav taws xob pub dawb, thiab nyiam nplua nuj nyob hauv electrons.
Vim li cas electron rho tawm pawg nce kev ruaj ntseg?
Ib yam li cov pab pawg pub dawb tuaj yeem txhim kho cov carbocation, cov pab pawg rho tawm hluav taws xob ua kom tsis ruaj khov carbocations Cov pawg Carbonyl yog electron rho tawm los ntawm cov teebmeem inductive, vim qhov polarity ntawm cov C=O. ob daim ntawv cog lus. … Qhov carbocation no yog qhov sib piv ruaj khov.
