Vim li no los ntawm kev sib tham saum toj no peb tuaj yeem txiav txim siab tias hyperconjugation cuam tshuam nrog kev sib tshooj ntawm $\sigma -p$ orbitals, piv txwv li kev xaiv B yog cov lus teb raug.
Yuav ua li cas ntawm cov orbitals hauv qab no koom nrog kev sib koom ua ke?
Feem ntau, hyperconjugation cuam tshuam nrog kev sib cuam tshuam ntawm electrons hauv a sigma (σ) orbital (piv txwv li C–H lossis C–C) nrog ib qho chaw nyob ib sab uas tsis muaj kev sib txuas nrog p lossis antibonding σ los yog π orbitals muab ib khub txuas ntxiv molecular orbitals.
Yuav ua li cas kev sib cog lus koom nrog hauv kev sib koom siab?
Hyperconjugation yog qhov tshwm sim ntawm ib feem sib tshooj ntawm sigma bonding orbital ntawm C─H ntawm cov pa roj carbon atom uas nyob ib sab rau ntawm qhov chaw electron-deficient radical nrog ib nrab puv 2p orbital.
Puas hyperconjugation koom nrog delocalisation ntawm pi electrons?
Hyperconjugation yog the delocalisation ntawm sigma electron tseem hu ua sigma-pi conjugation. Kev tshwm sim ntawm α-H nrog rau ob daim ntawv cog lus, triple daim ntawv cog lus lossis cov pa roj carbon uas muaj cov nqi zoo (hauv carbonium ion) lossis umpaired electron (hauv dawb radical) yog ib qho mob rau hyperconjugation.
Yuav ua li cas thaum orbitals sib tshooj?
Nyob rau hauv cov ntawv cog lus tshuaj, ib qho kev sib tshooj ntawm qhov sib tshooj yog qhov concentration ntawm orbitals ntawm cov atoms uas nyob ib sab hauv tib cheeb tsam ntawm qhov chawOrbital overlap tuaj yeem ua rau kev tsim daim ntawv cog lus. … Cov pa roj carbon hybrid orbitals muaj ntau dua sib tshooj nrog cov hydrogen orbitals, thiab thiaj li tsim tau C-H daim ntawv cog lus muaj zog.
