Name: 18-Electron rule
SKU: 66925809
Price: 4847.00 TWD
Availability: InStock
ISBN: 9786130636470

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Type

Physical Book

Publisher

Alphascript Publishing

Language

English

Format

Paperback

ISBN13

9786130636470

18-Electron rule

New Book Imported to Taiwan

Delivery: 20 Oct - 28 Oct

NT$ 4,847

NT$ 4,847

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Synopsis "18-Electron rule"

The 18-electron rule is a rule of thumb used primarily in transition metal chemistry for characterizing and predicting the stability of metal complexes. Valence shells of a transition metal can accommodate 18 electrons: 2 in each of the five d orbitals (10 in total); 2 in each of the three p orbitals (6 in total); and 2 in the s orbital (see Electron counting). In practice, of course, these orbitals cannot directly accept electrons, otherwise one would encounter ions such as Fe10 and Pt8 . However, combination of these atomic orbitals with ligand orbitals gives rise to nine molecular orbitals which are either metal-ligand bonding or non-bonding. (There are also some higher energy anti-bonding orbitals). The complete filling of these nine lowest energy orbitals with electrons, whether those electrons originate from the metal or from any ligands, is the basis of the 18-electron rule. When the metal has 18 electrons, it has then achieved the same electron configuration as the noble gas at the end of the period.

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