Explain valence bond theory, Chemistry

Assignment Help:

Q. Explain Valence Bond Theory?

This concept starts with the assumption that the bond between the metal ion and the ligand is basically covalent in nature. In order to form a chemical bond the central metal ion must have enough of vacant orbitals to accept the lone pairs of electrons from the ligands. The number of bonds formed is thus' directly related to the number of vacant orbitals on the metal ion. At this stage. Pauling introduced the concept of hybridised atomic orbitals.  Accordingly, the vacant atomic orbitals on the metal ion combine to give a set of hybridised orbitals. For hybridisation only those orbitals are used which have the correct orientation in space and whose energy values are very near to each other. These hybridised orbitals overlap with the ligand orbitals to share the lone pairs of electrons from the ligands. Since these hybridised orbitals show a definite orientation in space, the geometry of the molecule is determined by the kind of hybridisation involved.

849_Explain Valence Bond Theory.png

In Table, the numbers shown in paranthesis represent the number of specific. Orbitals involved in hybridisation. They do not indicate either the principal quantum number or the number of electrons in a particular orbital.


Related Discussions:- Explain valence bond theory

Noise management strategy on a particular site, Question: a) If you wer...

Question: a) If you were a newly appointed environmental engineer in a wastewater treatment plant and one of your tasks was to characterise the wastewater. According to you,

Calculate the weight and volume of acid, A gas contains 350 ppm of H 2 S in...

A gas contains 350 ppm of H 2 S in CO 2 at 72°F and 1.53 atm pressure.  If the gas is liquified, what is the weight fraction H 2 S? You are asked to make up a laboratory soluti

Polarity and salvation, Polarity and salvation   A solvent is a liqu...

Polarity and salvation   A solvent is a liquid medium in which dissolved are known as solutes. Solvents are useful for storing species that would otherwise be in inconvenien

Chem project, need to know common methods of preparing acetone/propanone. N...

need to know common methods of preparing acetone/propanone. Need to include chemical equation for reaction that produces that molecule.

Define the phenomenon resonance, When a molecule is shown by two or more ne...

When a molecule is shown by two or more nearly equal structures, which vary in the arrangement of electrons, then the molecule is said to exhibit resonance.

Structure and bonding in solids-crystals and glasses, Crystals and glasses ...

Crystals and glasses   Unlike a complex ion or molecule, which is a finite (often small) assembly of atoms, a solid has no fixed shape and size but can add atoms indefinit

Electrically conducting polymers, Q. Write short note on "Electrically cond...

Q. Write short note on "Electrically conducting polymers". Ans. electrically conducting polymers: Many synthetic organic polymers have been found to possess high electrical c

Determine the equilibrium constant, Q. Determine the equilibrium constant? ...

Q. Determine the equilibrium constant? At 298 K, the molar conductivities at infinite dilution of NH 4 Cl, NaOH and NaCl are 129.8,217.4 and 108.9 ohm -1 cm 2 mol -1 respect

Acetic acid or ethanoic acid, Acetic Acid or Ethanoic Acid Acetic acid ...

Acetic Acid or Ethanoic Acid Acetic acid is the oldest termed as fatty acid. It is the major constituent of vinegar and therefore its name (Latin acetum = vinegar)

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd