Combination of Atomic Orbitals to Form Molecular Orbitals

Combination of Atomic Orbitals to Form Molecular Orbitals and Comparison between VB and MO theories - Organic Chemistry

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(i) Combination of s-orbitals :

Combin~tion of p-orbitals :

(i) Combination of two p-orbitals 

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(ii) Combination of two pz-atomic orbitals

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Comparison between VB and MO theories

(A) Similarities between VB and MO theories:

(i) They account for the directional nature of the bond.
(ii) Bond results by the overlapping of two orbitals of minimum energy.
(iii) Electronic charge persists in between two atomic nuclei in bond formation.
(iv) Atomic orbitals should be of same energy, should overlap and should have same symmetry.

(B) Dissimilarities between VB and MO theories :