Question

mention the features of valence bond theory​

Answer 1

Answer:

here is the answer

Explanation:

Salient features of VBT:

1) A central metal ion provide number of vacant s,p & d orbital to ligands to form coordinate bond.

2) Number of vacant orbitals provided by central metal ion will equal to its coordination number.

3) Vacant orbital of central metal ion overlaps with filled orbitals of ligands to form coordinate bond.

4) Vacant orbitals undergo hybridisation to form same number of hybrid orbitals.

5) The geometry of complex ion depends on hybridisation of metal orbitals.

6) If overlapping of orbitals will more then strong coordinate bond will form.

7) The hybridisation of type (n-1)d in complex called inner complex while nd hybridisation is called outer complex

.9) If central metal having unpaired electrons then the complex show paramagnetic property if no unpaired electron is present then complex show diamagnetic property.

10) The strong field ligands like NH3, CN-, causes pairing of electrons then this process are called spin pairing.

Answer 2

VB: Valence Bond Theory

• Many theories have been proposed to describe the type of bonding that occurs in coordination molecules. The Valence Bond (VB) theory is one of them.
• The Valence Bond Theory was created in order to utilize quantum physics to explain chemical bonding.
• The primary focus of this theory is on how specific bonds are created from the atomic orbitals of the involved atoms during the synthesis of molecules.
• The chemical bond formation was not clarified by the Lewis approach to chemical bonding.
• Additionally, the notion of valence shell electron pair repulsion, or VSEPR theory, had little applicability.

Features of the Valence Bond Theory:

1. The valence bond theory's maximal overlap condition, which is what causes covalent bonds to form in many molecules, can explain this phenomenon.
2. Its most crucial application is this one. For instance, the variance in the overlapped orbitals in H2 and F2 molecules can be used to explain the differences in the length and tensile strength of their respective chemical bonds.
3. According to the valence bond theory, the hydrogen atom's 1s orbital and the fluorine atom's 2p orbital overlap to create the covalent link in an HF molecule.

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