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Valence-bond theory is one of the two qu...

Valence-bond theory is one of the two quantum mechanical approaches that explains bonding in molecules In some cases, valence bond theroy cannot cannot satisfactorily account for observed properties of molecules
`MO` electronic configuration of superoxide ion is .

A

`KK^(**)(sigma2s)^(2),(sigma^(**)2s)^(2),(sigma2p_(z))^(2) (pi2p_(y))^(2) (pi^(**)2p)^(2)(pi^(**)2p_x)^(1)`

B

`KK^(**)(sigma2s)^(2),(sigma^(**)2s)^(2),(sigma2p_(z))^(2) (pi2p_(y))^(2) (pi^(**)2p)^(2)(pi^(**)2p_x)^(2)`

C

`KK^(**)(sigma2s)^(2),(sigma^(**)2s)^(2),(sigma2p_(z))^(2) (pi2p_(y))^(2) (pi^(**)2p)^(2)(pi^(**)2p_x)`

D

none of these

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A
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Formation OF Molecules on the Basis OF Valence Bond Theory (VBT)

Structure of xenon fluorides cannot be explained by valence bond theory. Explain.

Valence bond theory for bonding in transition metal complexes was developed by Pauling. From the valence bond point of view, formation of a complex involves reaction between Lewis bases (ligands) and a Lewis acid (metal atom or metal ion) with the formation of coordination covalent (or dative) bonds between them. The model utilizes hybridization of metal s, p and d valence orbitals to account for the observed structures and magnetic properies of complexes. Valence bond theory is able to deal satisfactorily with many stereo chemical and magnetic properies but is has nothing to say about electronic spectra or the reason for the kinetic inertness of chromium (III) and low spin cobalt (III) octahedral complexes. To understand this and more other features of transition metal we must turn to other theories like crystal field theory etc. Pure crystal field theory assumes that the only interaction between the metal ion and the ligands is an electrostatic or ionic one with the ligands being regarded as negative point charges. This theory is quite successful in interpreting many important properties of complexes. Select the correct statement about the crystal field theory.

CENGAGE CHEMISTRY-CHEMICAL BONDING AND MOLECULAR STRUCTURE-Exercises Linked Comprehension
  1. The HF(2)^(Θ) ion solid state and in liquid HF but not in the dilute a...

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  2. The HF(2)^(Θ) ion solid state and in liquid HF but not in the dilute a...

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  3. The HF(2)^(Θ) ion solid state and in liquid HF but not in the dilute a...

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  4. The HF(2)^(Θ) ion solid state and in liquid HF but not in the dilute a...

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  5. Valence-bond theory is one of the two quantum mechanical approaches th...

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  6. Valence-bond theory is one of the two quantum mechanical approaches th...

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  7. Valence-bond theory is one of the two quantum mechanical approaches th...

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  8. Valence-bond theory is one of the two quantum mechanical approaches th...

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  9. Valence-bond theory is one of the two quantum mechanical approaches th...

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  10. According to the moleular orbital theory, all atomic orbitals combine ...

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  11. According to the moleular orbital theory, all atomic orbitals combine ...

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  12. According to the moleular orbital theory, all atomic orbitals combine ...

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  13. Most of the polyatomic molecules except a few such as CO(2) and CS(2) ...

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  14. Most of the polyatomic molecules except a few such as CO(2) and CS(2) ...

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  15. Most of the polyatomic molecules except a few such as CO(2) and CS(2) ...

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  16. MO' s are formed by the overlap of A'O s Two AO's combine to form two ...

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  17. MO' s are formed by the overlap of A'O s Two AO's combine to form two ...

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  18. MO' s are formed by the overlap of A'O s Two AO's combine to form two ...

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  19. MO' s are formed by the overlap of A'O s Two AO's combine to form two ...

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  20. MO' s are formed by the overlap of A'O s Two AO's combine to form two ...

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