18-electron rule
The 18-electron rule is a chemical rule of thumb used primarily for predicting and rationalizing formulas for stable transition metal complexes, especially organometallic compounds. The rule is based on the fact that the valence orbitals of transition metals consist of five d orbitals, one s orbital and three p orbitals which can collectively accommodate 18 electrons as either bonding or nonbonding electron pairs. This means that the combination of these nine atomic orbitals with ligand orbitals creates nine molecular orbitals that are either metal-ligand bonding or non-bonding. When a metal complex has 18 valence electrons, it is said to have achieved the same electron configuration as the noble gas in the period. The rule is not helpful for complexes of metals that are not transition met
16-Electron Complexes16-Electron complex16-Electron complexes18-Electron rule18-electron complex18VE compound18 (number)18 electron rule18e complex18e ruleAlkali metalAllylpalladium chloride dimerBeta-Hydride eliminationChadwick A. TolmanChemical reactionChromoceneCis effectCobalt(II) chlorideCobaltoceneCoordination complexCyclopentadienyl allyl palladiumCyclopentadienyliron dicarbonyl dimerCyclopentadienyliron dicarbonyl iodideD electron countDewar benzeneDiiminopyridineDiiron nonacarbonylDuodectet ruleEighteen-electron ruleEighteen electron ruleElectron RuleElectron countingElectron deficiencyElectron shellFerroceneHalf sandwich compoundHapticityHexaammineplatinum(IV) chlorideHexamethylbenzeneHexamminecobalt(III) chloride
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18-electron rule
The 18-electron rule is a chemical rule of thumb used primarily for predicting and rationalizing formulas for stable transition metal complexes, especially organometallic compounds. The rule is based on the fact that the valence orbitals of transition metals consist of five d orbitals, one s orbital and three p orbitals which can collectively accommodate 18 electrons as either bonding or nonbonding electron pairs. This means that the combination of these nine atomic orbitals with ligand orbitals creates nine molecular orbitals that are either metal-ligand bonding or non-bonding. When a metal complex has 18 valence electrons, it is said to have achieved the same electron configuration as the noble gas in the period. The rule is not helpful for complexes of metals that are not transition met
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18电子规则又称有效原子序数法则(EAN),是过渡金属簇合物 ...... )基础上提出的,适用于八电子规则不适用的过渡金属配合物部分。
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De 18-elektronenregel is een r ...... door de Britse scheikundige .
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Die 18-Elektronen-Regel (18-Va ...... gel“ der Hauptgruppenelemente.
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En química de coordinación, la ...... ón del grupo 12 (Zn, Cd y Hg).
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La regla dels 18 electrons és ...... guració com la d'un gas noble.
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La regola dei 18 elettroni aff ...... cco s, lantanoidi e attinoidi.
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La règle des 18 électrons est ...... valente à celle des gaz rares.
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The 18-electron rule is a chem ...... emist Irving Langmuir in 1921.
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Пра́вило 18-ти електро́нів (ан ...... х металоорганічних комплексів.
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18电子规则又称有效原子序数法则(EAN),是过渡金属簇合物 ...... )基础上提出的,适用于八电子规则不适用的过渡金属配合物部分。
@zh
De 18-elektronenregel is een r ...... de elektronenconfiguratie als
@nl
Die 18-Elektronen-Regel (18-Va ...... gel“ der Hauptgruppenelemente.
@de
En química de coordinación, la ...... antes metal-ligando (También h
@es
La regla dels 18 electrons és ...... guració com la d'un gas noble.
@ca
La regola dei 18 elettroni aff ...... lo di transizione è in uno sta
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La règle des 18 électrons est ...... st la base de la règle des 18
@fr
The 18-electron rule is a chem ...... ls that are not transition met
@en
Пра́вило 18-ти електро́нів (ан ...... х металоорганічних комплексів.
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label
18 전자 규칙
@ko
18-Elektronen-Regel
@de
18-electron rule
@en
18-elektronenregel
@nl
18电子规则
@zh
Regla de los 18 electrones
@es
Regla dels 18 electrons
@ca
Regola dei 18 elettroni
@it
Règle des 18 électrons
@fr
Правило 18 електронів
@uk