What can the crystal field theory explain which the valence bond theory Cannot explain?
The theory cant explain the relative strength of the ligands i.e. it cannot explain that why water is stronger than OH according to spectrochemical series .
What are the advantages of crystal field theory over valence bond theory?
Advantages of crystal field theory over valence bond theory CFT predicts a gradual change in magnetic properties of complexes rather than the abrupt change predicted by VBT. According to VBT, the bond between the metal and the ligand is covalent,,while according to CFT it is purely ionic.
What is the difference between molecular orbital theory and valence bond theory?
The main difference between valence bond theory and the molecular orbital theory is that valence bond theory explains the hybridization of orbitals whereas the molecular orbital theory does not give details about the hybridization of orbitals.
What is crystal field theory?
Crystal field theory (CFT) describes the breaking of degeneracies of electron orbital states, usually d or f orbitals, due to a static electric field produced by a surrounding charge distribution (anion neighbors).
What is the main difference between VBT mot?
| Valence Bond Theory (VBT) | Molecular Orbital Theory (MOT) |
|---|---|
| Bonds are localized to two atoms not molecule. | Bonds are localized to two atoms as well as molecule. |
| Valence orbital theory was first proposed by W.Heitler and F.London in 1927. | Molecular orbital theory was proposed by F. Hund and R.S. Mulliken in 1932. |
What are the two limitations of crystal field theory?
This theory takes only d-orbitals of a central atom into account. The s and p orbits are not considered for the study. The theory fails to explain the behaviour of certain metals which cause large splitting while others show small splitting.
What is the main advantage of CFT?
The major advantage of CFT is that it is simple. Ligand Field Theory (LFT) is more advanced in that it is rooted in molecular orbital theory. It is more complex, but it is also more correct. LFT will not only get you to the correct answer more often, but it is also based on accurate ideas (as far as we know).
What are the advantages of crystal field theory?
Advantages of crystal field theory This theory can describe stability of complexes. More crystal field splitting energy, more will be the stability. This theory can explain the color and spectra of complexes. This theory accounts for the magnetic properties of complexes.
What is the basic difference between VBT and MOT?
According to valence bond theory (VBT), a covalent bond forms from the physical overlap of half-filled valence orbitals in two atoms. On the other hand, according to the molecular orbital theory (MOT), individual atoms combine to form molecular orbitals.
Which is not similar between VBT and MOT?
1. In vbt atomic bonds which develop are monocentric and mot develops molecular bond of polycentric. 2. Vbt can take form to produce the presence of ionic character whereas Mot is not capable of producing or predecting such effect.
What is valence bond in chemistry?
Valence bond theory describes bonding as a consequence of the overlap of two separate atomic orbitals on different atoms that creates a region with one pair of electrons shared between the two atoms. When the orbitals overlap along an axis containing the nuclei, they form a σ bond.
What is the difference between crystal field theory and ligand field theory?
The main difference between crystal field theory and ligand field theory is that crystal field theory describes only the electrostatic interaction between metal ions and ligands, whereas ligand field theory considers both electrostatic interaction and covalent bonding between the metal and its ligand.