An Alternative Description for the Electronegativity Difference in Binary Ionic Solids

Journal of the Brazilian Chemical Society

article

Lima, Heveson¹  Ferreira, Douglas¹  Souza, Adelmo S.²  Santos, Marcos A. C. dos³ 

[1]Centro Multidisciplinar do Campus de Luís Eduardo Magalhães, Universidade Federal do Oeste da Bahia

[2]Centro Multidisciplinar do Campus de Bom Jesus da Lapa, Universidade Federal do Oeste da Bahia

[3]Departamento de Física, Universidade Federal de Sergipe

关键词: binary ionic solids;    Coulomb interaction;    effective atomic number;    charge transferred;    chemical bond;    electronegativity difference;   

DOI  :  10.21577/0103-5053.20200193

学科分类：内科医学

来源: SciELO

【 摘 要 】

We are introducing an alternative analytical expression to the electronegativity difference (∆χ) as a function of the charge ge, g is the charge factor, the fraction of the electronic charge devoted to the bond and e the elementary charge, the packing factor (p) and the effective atomic number (Z eff ) of binary ionic solids, by using the very basic Coulomb interaction, modified by the introduction of p, and the relationship between the electric dipole moment (µ) and ∆χ in Debye units. When compared to the Pauling’s, Gordy’s, Allred-Rochow’s and Allen’s scales, our calculations deviate around 10% to all ionic crystals with such data available in the literature. A very simple expression with satisfactory estimates, with no need of numerical procedure, is announced. The values of g play the important role of indicating the character of the chemical bond. It opens up an alternative opportunity to understand the nature of ionic chemical bonds and is able to describe the character of the bonding in any ionic polyatomic system.

【 授权许可】

CC BY