The total capability of an atomic attracting valence electrons can be measured by the sum of ionization energies of valence electron in ground stage free atom and its electron affinity called Total Attracting Energy, TAE=Σ n iE i +EA, where, E i is the ionization energy of the i th valence shell electron in ground state free atom, n i is the number of valence shell electron bearing energy E i , and EA is the electron affinity.
The formula of electronegativity for main group elemen ts was been put forward. In this paper,X=-0.16045E AK+0.0462N ,whe re E AK refers to the average valence shell electron energy, an d N refers to electron number for valence shell.
On the basis of hybrid orbital theory and valence shell electron pair repulsion (VSEPR) theory that anticipate and judge the configuration of covalent polyatomic molecule or iron(not including complexes),a simple and convenient method to calculate the type of the central atomic hybrid orbital directly is deduced by the valence shell electron pairs.
The total capability of an atomic attracting valence electrons can be measured by the sum of ionization energies of valence electron in ground stage free atom and its electron affinity called Total Attracting Energy, TAE=Σ n iE i +EA, where, E i is the ionization energy of the i th valence shell electron in ground state free atom, n i is the number of valence shell electron bearing energy E i , and EA is the electron affinity.
A novel connectivity index of valence shell electron energy levels for a ground state atom m VEI (m=0,1,2,...) is put forward in this paper,which appears uniquely to the ground state atom and has excellent structural selectivity.
On the basis of the Valence Shell electron Pair repulsion theory, we have justified bond angles in AB_(4-n) molecules depend on the bond parameter Z~(*2)/r_k of thebonding atoms A and B. Formulas for calculation of the bond angles of AX_3 and AH_(4-n) molecules of the VA、VIA group elements are proposed and extended.
A chief tenet of VSEPR (valence shell electron pair repulsion theory) is that very electronegative atoms or groups attached to a central atom pull electrons toward themselves.
The structures of complex anions of Pb(II) coordination compounds (complexonates) with monoamino-, diamino-, and polyaminopolycarboxylic acids as ligands were interpreted in terms of a model of the valence shell electron pair repulsion.
Diagram and describe the shape of a covalently bonded pure silicon molecule using the valence shell electron pair repulsion theory.
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On the basis of the Valence Shell electron Pair repulsion theory, we have justified bond angles in AB_(4-n) molecules depend on the bond parameter Z~(*2)/r_k of thebonding atoms A and B. Formulas for calculation of the bond angles of AX_3 and AH_(4-n) molecules of the VA、VIA group elements are proposed and extended.
Using a modified Gasteiger's method for calculation of atomic charges in molecules and the partial equalization of orbital electronegativity model (PEOE) the PEOE electronegati vities of bonding atoms in halides of Group V elements were calculated. A linear relation ship between molecular bond angles and the PEOE electronegativities was obtained, and the variations of the bond angles were explained in a systematic way.In this paper the quantitative aspect of the Valence-Shell #...