Qhov Tseem Ceeb Qhov txawv - Bidentate vs Ambidentate Ligands
Qhov sib txawv tseem ceeb ntawm bidentate thiab ambidentate ligands yog tias bidentate ligands tuaj yeem khi rau lub hauv paus atom ntawm ob daim ntawv cog lus tib lub sijhawm thaum ambidentate ligands tuaj yeem tsim ob daim ntawv cog lus nrog lub hauv paus atom, tab sis tsim tsuas yog ib daim ntawv cog lus ntawm ib lub sijhawm..
Ligands yog cov khoom siv hluav taws xob nplua nuj lossis cov anions uas tuaj yeem pub dawb electron khub rau ib qho atom uas muaj cov hluav taws xob zoo. Muaj ntau hom ligands hu ua Monodentate ligands, bidentate ligands, polydentate ligands, thiab lwm yam raws li tus naj npawb ntawm daim ntawv cog lus lawv tuaj yeem tsim nrog ib lub atom.
Bidentate Ligands yog dab tsi?
Bidentate ligands yog cov molecules lossis anions uas tuaj yeem khi rau ib lub atom ntawm ob qho kev sib koom tes covalent bonds. Coordinate covalent bonds yog ib hom ntawm covalent bonds uas yog tsim thaum ib hom tshuaj electron nplua nuj pub dawb electron khub rau ib hom tshuaj electron-tsis muaj xws li cov hlau atoms zoo. Thaum ligands thiab cations khi rau hauv txoj kev no, ib qho kev sib koom ua ke yog tsim. Lub atom uas cov ligands sib koom ua ke hu ua lub chaw sib koom tes.
Daim duab 01: Ethylenediamine yog Bidentate Ligand
A bidentate ligand muaj ob lub atoms pub dawb. Qhov no txhais tau tias, muaj ob lub atoms uas tuaj yeem pub lawv cov khoom siv hluav taws xob ib leeg. Qee qhov piv txwv rau cov ligands muaj xws li oxalate ion (C 2O42-) uas muaj ob oxygen atoms li pub atoms thiab ethylenediamine (C₂H₄(NH₂)₂) uas muaj ob lub nitrogen atom ua pub atoms.
Ambidentate Ligands yog dab tsi?
Ambidentate ligands yog cov molecules lossis ions uas muaj ob lub atoms pub dawb tab sis muaj peev xwm los khi nrog ib lub atom ntawm tsuas yog ib qho pub dawb atom ib zaug. Piv txwv ntawm ambidentate ligands suav nrog thiocyanate ion (SCN –) uas ob leeg sulfur atom thiab nitrogen atom muaj peev xwm pub dawb ib leeg electron khub. Tab sis ob qho tib si sulfur atom lossis nitrogen atom tuaj yeem khi rau qhov chaw sib koom ua ke ntawm ib lub sijhawm.
Daim duab 02: Thiocyanate yog Ambidentate Ligand
Ib qho piv txwv yog nitrate ion (NO
2–) uas ob qho tib si nitrogen atom thiab oxygen atom tuaj yeem ua tus pub atom.
Dab tsi yog qhov zoo sib xws ntawm Bidentate thiab Ambidentate Ligands?
- Ob leeg Bidentate thiab Ambidentate ligands muaj ob lub atoms pub dawb.
- Ob lub ligands muaj tsawg kawg yog ob lub atom nrog ib leeg electron khub.
Qhov txawv ntawm Bidentate thiab Ambidentate Ligands yog dab tsi?
Bidentate vs Ambidentate Ligands |
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| Bidentate ligands yog cov molecules lossis anions uas tuaj yeem khi rau ib lub atom ntawm ob qho kev sib koom tes covalent bonds. | Ambidentate ligands yog cov molecules lossis ions uas muaj ob lub atoms pub dawb tab sis muaj peev xwm los khi nrog lub atom ntawm tsuas yog ib tus neeg pub atom ib zaug xwb. |
| Bond Formation | |
| Bidentate ligands muaj peev xwm tsim tau ob qho kev sib koom tes sib koom ua ke ntawm ib lub sijhawm. | Ambidentate ligands muaj peev xwm tsim tau ib qho kev sib koom tes covalent daim ntawv cog lus ib zaug. |
| Examples | |
| Piv txwv ntawm bidentate ligands suav nrog ethylenediamine thiab oxalate ion. | Piv txwv ntawm ambidentate ligands suav nrog thiocyanate ion thiab nitrate ion. |
Summary – Bidentate vs Ambidentate Ligands
Ligands yog cov molecules lossis ions uas tuaj yeem khi nrog electron-deficient atoms ntawm kev sib koom tes covalent bonds. Bidentate ligands thiab ambidentate ligands yog ob hom ligand. Qhov txawv ntawm bidentate thiab ambidentate ligands yog tias bidentate ligands tuaj yeem khi nrog lub hauv paus atom ntawm ob daim ntawv cog lus tib lub sijhawm thaum ambidentate ligands muaj peev xwm tsim tau ob daim ntawv cog lus nrog lub hauv paus atom tab sis tsim tsuas yog ib daim ntawv cog lus ntawm ib lub sijhawm.
