Ion electronegativity derived from Zhang effective nuclear charge

Zhang ionocovalent theory applications (16)

Yonghe Zhang

American Huilin Institute, http://www.amhuilin.com/

 

     Base on the model of Zhang effective nuclear charge Z* and effective pricipal quantum number n* [1]:

Z*=n*(Iz/R)1/2

Zhang derived Ion electronegativity [1,2]:

Xz = 0.241 n*( Iz /R) ½rc-2 + 0.775

where Iz is the ultimate IE. R is the Rydberg constant, R = 2p2µ42e4/h2 = 13.6 eV, h is Planck’s 

Zhang effective nuclear charge Z* is derived from Bohr energy model [3]:

E = - Z2me4/8n2h2 ?02 = - RZ2/n2

and Zhang effective pricipal quantum number n* is derived from the observation-feedback calculation based on the consideration of the spatial screening of the electron orbitals and the Zheng’s ionization energies [4]:

 

n

1

2

3

4

5

6

7

n*

1(0.85)

1.99

2.89

3.45

3.85

4.36

4.36(4.99)

 

[1]  Y. Zhang, J. Molecular Science 1, 125(1981)

[2] Y. Zhang. Inorg. Chem., 1982, 21, 3886.

[3] N. Bohr, Philosophical Magazine 26, 1-25 (1913)

[4] N.-W. Zheng, K’o Hsueh T’ung Pao, 1977, 22 (12), 531

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