Video: EAN xam li cas hauv chemistry?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Feem ntau EAN ntawm central hlau ion yuav muab sib npaug rau cov xov tooj ntawm electrons nyob rau hauv lub ze tshaj noble roj. Yog tias EAN ntawm lub hauv paus hlau yog sib npaug rau cov xov tooj ntawm electronsin lub ze tshaj noble gas ces lub complex muaj ntau dua stability. EAN = [Z metal – (ox. state of the metal) +2(coordination number of the metal)].
Ua raws li qhov kev pom no, EAN txoj cai txhais li cas?
… kev soj ntsuam, txij li lub npe hu ua EAN txoj cai , hais tias nyob rau hauv ib tug xov tooj ntawm cov hlau complexes cov hlau atom nyhav mus ncig nws tus kheej nrog txaus ligands uas lub resulting tshwm sim. siv tau atomic naj npawb yog tus lej sib npaug rau atomicnumber ntawm noble-gas keeb pom nyob rau tib lub sij hawm nyob rau hauv uas cov hlau …
Ib yam li ntawd, 18 electron txoj cai nrog piv txwv yog dab tsi? Hauv no piv txwv , lub molecular compound muaj ib tug 18 electron suav, uas txhais tau hais tias tag nrho nws cov orbitals yog puv thiab cov compound yog ruaj khov. Kom txaus siab rau 18 electronrule , the [Co(CO)5]z compound yuav tsum muaj acharge ntawm z = +1.
Kuj tseem paub yog, koj ua li cas thiaj nrhiav tau tus lej atomic zoo?
Mathematicically, cov siv tau atomic naj npawb Zeff ua tuaj yeem suav tau siv txoj hauv kev hu ua "self-consistent field" suav, tab sis hauv cov xwm txheej yooj yim tsuas yog coj los ua tus lej atomic rho tawm tus lej ntawm cov electrons nruab nrab ntawm lub nucleus thiab cov electron raug txiav txim siab.
Qhov twg tsis ua raws li txoj cai EAN?
Cov EAN ( Muaj txiaj ntsig Atomic Number ) yog siv tau rau feem ntau carbonyls. Txawm li cas los xij, qee cov carbonyls nyiam V (CO) 6 tsis txhob ua raws li EAN txoj cai . Totalelectrons nyob ib ncig ntawm lub hauv paus hlau atom (V) yog 23+12 = 35, uas tsis yog sib npaug rau tus naj npawb ntawm cov electrons uas nyob ib puag ncig cov roj noble, yog li nws yog kev ua txhaum cai ntawm EANrule.
Pom zoo:
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