Qhov sib txawv tseem ceeb ntawm kev tiv thaiv kev tiv thaiv thiab kev tsis sib txuas yog tias cov tshuaj tiv thaiv kab mob ua kom lub zog ntawm cov molecule whereas nonbonding orbitals tsis hloov lub zog ntawm lub molecule.
Cov ntsiab lus antibonding thiab nonbonding los ntawm molecular orbital txoj kev xav. Raws li qhov kev xav no, cov orbitals no yog hybrid orbitals uas tsim vim sib tshooj ntawm lwm cov orbitals.
Antibonding yog dab tsi?
Antibonding molecular orbitals yog orbitals uas muaj electrons sab nraum cheeb tsam ntawm ob lub atomic nuclei. Electrons nyob rau hauv lub antibonding orbitals txo cov stability ntawm ib tug molecule vim cov electrons siv feem ntau ntawm lawv lub sij hawm sab nraum lub atomic nuclei. Yog li ntawd, lub electron ceev ntawm antibonding molecular orbitals yog tsawg dua piv rau bonding molecular orbitals, thiab antibonding molecular orbitals qhia cov electron ntom sab nraum daim ntawv cog lus.
Antibonding molecular orbitals muaj zog dua li ntawm atomic orbitals thiab bonding molecular orbitals. Qhov no yog vim hais tias cov electrons nyob rau hauv cov orbitals tsis pab txo cov repulsion ntawm ob atomic nuclei. Yog li ntawd, kev ruaj ntseg ntawm cov tebchaw uas muaj electrons nyob rau hauv lub antibonding molecular orbitals yog qis dua. Txawm li cas los xij, hauv cov tebchaw ruaj khov, muaj cov khoom siv hluav taws xob hauv cov tshuaj tiv thaiv molecular orbitals tsis muaj lossis tsawg dua. Ntxiv mus, qhov spatial kev npaj ntawm antibonding molecular orbitals tsis txiav txim siab cov duab los yog geometry ntawm ib tug molecule.
Raws li cov duab saum toj no, cov electron ceev hauv kev sib txuas molecular orbital yog sib npaug ntawm cov tshuaj tiv thaiv molecular orbital. Yog li ntawd, nws yog ib tug heev unstable molecule. Li no, He2 molecule tsis muaj nyob. Lub antibonding molecular orbital yog muab raws li σ.
Kev tsis sib haum xeeb yog dab tsi?
Nonbonding orbital yog lub molecular orbital uas ntxiv lossis tshem tawm ntawm cov hluav taws xob tsis nce lossis txo qhov kev txiav txim siab ntawm atoms. Peb feem ntau xaiv lub orbital no los ntawm "n". Cov orbitals no zoo li ib leeg electron khub hauv Lewis cov qauv.
Tsis tas li ntawd, lub zog ntawm qhov tsis sib koom ua ke yog nyob nruab nrab ntawm kev tiv thaiv lub zog orbital thiab kev sib txuas orbital.
Qhov txawv ntawm Antibonding thiab Nonbonding yog dab tsi?
Antibonding thiab nonbonding orbitals yog molecular orbitals. Qhov sib txawv tseem ceeb ntawm antibonding thiab nonbonding yog tias antibonding orbitals nce lub zog ntawm lub molecule whereas nonbonding orbitals tsis hloov lub zog ntawm ib tug molecule. Tsis tas li ntawd, lub xub ntiag ntawm antibonding orbitals zoo li tsis ruaj khov ntawm cov molecule thaum nonbonding orbitals tsis muaj kev cuam tshuam rau kev ruaj ntseg ntawm cov molecule.
Summary – Antibonding vs Nonbonding
Kev tiv thaiv kab mob thiab tsis sib koom ua ke yog cov tshuaj molecular orbitals. Qhov sib txawv tseem ceeb ntawm antibonding thiab nonbonding yog tias antibonding orbitals nce lub zog ntawm lub molecule whereas nonbonding orbitals tsis hloov lub zog ntawm ib tug molecule.
