Qhov sib txawv tseem ceeb ntawm resonance thiab π conjugation yog tias resonance yog hais txog kev ruaj ntseg ntawm cov molecule nyob rau hauv lub xub ntiag ntawm delocalized electrons, whereas π conjugation yog hais txog lub tswvyim ntawm pi electrons raug faib thoob plaws hauv tag nrho cheeb tsam ntawm ib tug molecule es. tshaj li ntawm ib qho atom hauv molecule.
Resonance thiab π conjugation yog cov ntsiab lus zoo sib xws txij li π conjugation ua rau resonance hauv cov tshuaj sib xyaw.
Resonance yog dab tsi?
Resonance yog ib lub tswv yim tshuaj uas piav qhia txog kev sib cuam tshuam ntawm ib leeg electron khub thiab daim ntawv cog lus electron khub ntawm ib qho chaw. Feem ntau, cov nyhuv ntawm resonance yuav pab tau txiav txim siab cov qauv tshuaj ntawm cov organic lossis inorganic compound. Cov nyhuv no kuj tshwm sim hauv cov tshuaj sib txuas uas muaj ob daim ntawv cog lus thiab ib leeg electron khub. Ntxiv mus, cov nyhuv no ua rau polarity ntawm molecules.
Resonance qhia qhov ruaj khov ntawm cov tshuaj lom neeg ntawm delocalizing electrons hauv pi bonds. Ntawm no, cov hluav taws xob hauv cov molecules tuaj yeem txav mus nyob ib puag ncig atomic nuclei vim tias lub tshuab hluav taws xob tsis muaj qhov chaw ruaj khov hauv cov atoms. Yog li ntawd, ib leeg electron khub muaj peev xwm txav mus rau pi bonds thiab vice versa. Qhov no tshwm sim thiaj li tau txais lub xeev ruaj khov. Cov txheej txheem electron txav no hu ua resonance. Ntxiv mus, peb tuaj yeem siv cov qauv resonance txhawm rau kom tau txais cov qauv ruaj khov tshaj plaws ntawm cov molecule.
Daim duab 01: Resonance hauv Benzonitrile
Ib lub molecule tuaj yeem muaj ntau lub qauv resonance raws li tus naj npawb ntawm cov khub ib leeg thiab pi daim ntawv cog lus tam sim no hauv cov molecule. Tag nrho cov qauv resonance ntawm ib lub molecule muaj tib tus naj npawb ntawm cov electrons thiab tib qhov kev npaj ntawm atoms. Qhov tseeb qauv ntawm cov molecule yog ib tug hybrid qauv nyob rau hauv tag nrho cov resonance qauv. Muaj ob hom resonance nyhuv: zoo resonance nyhuv thiab tsis zoo resonance nyhuv.
Cov txiaj ntsig zoo resonance piav qhia txog qhov resonance uas tuaj yeem pom hauv cov tebchaw uas muaj cov nqi zoo. Qhov zoo resonance nyhuv yuav pab kom stabilize tus nqi zoo hauv cov molecule. Cov nyhuv tsis zoo resonance piav qhia txog kev ruaj khov ntawm cov nqi tsis zoo hauv cov molecule. Txawm li cas los xij, cov qauv hybrid uas tau txais los ntawm kev txiav txim siab resonance muaj qis zog dua li tag nrho cov qauv resonance.
P Conjugation yog dab tsi?
Lub sij hawm π conjugation yog hais txog delocalization nyob rau hauv cov organic tebchaw uas peb tuaj yeem soj ntsuam qhov kev faib tawm ntawm nonbonding pi electrons los ntawm ib lub molecule. Yog li, peb tuaj yeem piav qhia txog cov electrons hauv π conjugation system raws li cov khoom siv hluav taws xob tsis sib xws hauv cov tshuaj lom neeg. Ntxiv mus, lo lus no yog hais txog cov electrons uas tsis cuam tshuam nrog ib qho atom lossis ib daim ntawv cog lus.
Raws li piv txwv yooj yim, peb tuaj yeem muab benzene ua ib qho khoom muaj ntxhiab uas muaj cov khoom siv hluav taws xob delocalized. Feem ntau, lub nplhaib benzene muaj rau pi electrons hauv benzene molecule; peb feem ntau qhia cov graphically siv lub voj voog. Lub voj voog no txhais tau hais tias pi electrons cuam tshuam nrog tag nrho cov atoms hauv cov molecule. Qhov delocalization no ua rau lub nplhaib benzene kom muaj cov tshuaj lom neeg nrog cov ntawv cog lus ntev.
Qhov txawv ntawm Resonance thiab π Conjugation yog dab tsi?
Resonance thiab pi conjugation yog cov ntsiab lus zoo sib xws. Qhov tseem ceeb sib txawv ntawm resonance thiab π conjugation yog hais tias resonance yog hais txog kev ruaj ntseg ntawm ib tug molecule nyob rau hauv lub xub ntiag ntawm delocalized electrons whereas π conjugation yog hais txog lub tswvyim ntawm pi electrons raug faib thoob plaws hauv tag nrho cov cheeb tsam ntawm ib lub molecule es tsis yog nyob rau hauv ib tug tib atom. hauv molecule.
Cov hauv qab no infographic qhia txog qhov sib txawv ntawm resonance thiab π conjugation hauv daim ntawv tabular.
Summary – Resonance vs π Conjugation
Resonance thiab π conjugation yog cov ntsiab lus zoo sib xws uas π conjugation ua rau cov resonance hauv cov tshuaj sib txuas. Qhov tseem ceeb sib txawv ntawm resonance thiab π conjugation yog hais tias resonance yog hais txog kev ruaj ntseg ntawm ib tug molecule nyob rau hauv lub xub ntiag ntawm delocalized electrons whereas π conjugation yog hais txog lub tswvyim ntawm pi electrons raug faib thoob plaws hauv tag nrho cov cheeb tsam ntawm ib lub molecule es tsis yog nyob rau hauv ib tug tib atom. hauv molecule.
