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

Applications of hybridisation - size of the hybrid orbitals, Applications o...

Applications of hybridisation - Size of the hybrid orbitals As s- orbitals are closer to the nucleus than p- orbitals, it is reasonable to suppose that greater the s character

Derive an expression for the standard molar reaction entropy, Q. Derive an ...

Q. Derive an expression for the standard molar reaction entropy of a reaction that can be used to calculate its value from the thermodynamic equilibrium constant and its temperatur

What is glassy state of matter?, GLASS: Glass is amorphous solid which is ...

GLASS: Glass is amorphous solid which is not true solid, it is rather super cooled liquid which possesses a very high viscosity. It has no fixed melting point, on heating graduall

Hubles Test, Explain in brief hubles test for any test splution

Explain in brief hubles test for any test splution

F block element, why Zn metal regarded other element

why Zn metal regarded other element

What are the types of emulsions, Q. What are the types of emulsions? Em...

Q. What are the types of emulsions? Emulsions can be of three types: 1) Temporary emulsion: These require vigorous shaking just before they are used, as they separate out e

Yield, Hi I need ur help Thank you CuCo3+2HCl=CuCl2+CO3+H2O What mass of c...

Hi I need ur help Thank you CuCo3+2HCl=CuCl2+CO3+H2O What mass of cucl2 with react completely with 20 cm3 of 2000 mol cm3 of HCl? Calculate the % yield if 8.5g of chloride was pro

Atomic mass units, Q. What is Atomic Mass Units? Ans. Notice in the las...

Q. What is Atomic Mass Units? Ans. Notice in the last column of the table, the masses of the subatomic particles are reported in atomic mass units. The actual masses of electro

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