Assignment Help - homework help

  Valence bond theory

Valence bond theory (VB Theory):

Valence bond theory, mainly the work of Linus Pauling considered bonding as characterized by the overlap of atomic or hybrid orbitals of separate atoms.

The postulates of valence bond theory:

1) The central metal atom or ion makes accessible a number of vacant orbitals equivalent to its coordination number.

2) Such vacant orbitals made covalent bonds with the ligand orbitals.

3) The covalent bond is made by the overlap of a vacant metal orbital and filled ligand orbitals. This total overlap leads to the formation of a metal ligand, σ (i.e., sigma) bond.

4) A strong covalent bond is created only whenever the orbitals overlap to the maximum amount. This maximum overlapping is possible only whenever the metal vacant orbitals undergo a procedure termed as ‘hybridisation’. A hybridised orbital contain a better directional characteristics than an unhybridised one.

The table shown below provides the coordination number, orbital hybridisation and the spatial geometry of more significant geometrics.

2255_valemce bond theory.jpg

Magnetic moment:

A species containing at least one unpaired electron is termed to be paramagnetic. It is attracted by an external field. The paramagnetic moment is specified by the following spin-only formula.

µs = √n(n+2) BM

Here,
µs = spin-only magnetic moment
n = number of unpaired electrons
BM = Bohr magneton, the unit that states the magnetic moment. When the species does not have any unpaired electron, then it is diamagnetic.

Number of unpaired electrons           Spin-only moment (BM)

1                                                      √1(1+2) = √3 = 1.73
2                                                      √2(2+2) = √8 = 2.83
3                                                      √3(3+2) = √15 = 3.87
4                                                      √4(4+2) = √24= 4.90
5                                                      √5(5+2) = √35= 5.92

 

Latest technology based Chemistry Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Coordination Compounds homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Coordination Compounds, project ideas and tutorials. We provide email based Coordination Compounds homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Coordination Compounds. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Inorganic-Chemistry Homework Help and assignment help services. They use their experience, as they have solved thousands of the Chemistry assignments, which may help you to solve your complex issues of Coordination Compounds. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Home | Company Overview | Services | Discover Q&A | Sitemap | Contact Us | T & C | Refund Policy | Copyright Policy | Blog | Q&A | Directory

©TutorsGlobe All rights reserved 2022-2023.