Illustrate crystal field splitting in octahedral complexes, Chemistry

Assignment Help:

Q. Illustrate crystal field splitting in octahedral complexes?

Initially in a free ion state (I) all the orbitals are in degenerate state. In state (11), all the five orbitals are raised m energy when surrounded uniformly by negative charges. State (111) shows how the degeneracy is removed in an octahedral field. The set of lower three orbitals equal in energy in an octahedral field is given symbols t2g while the upper two equal-energy levels are denoted by e,. The difference in energy between t2g and eg sets is given by a symbol D0, (delta octahedral). Comparing states (11) and (III), we find that the only difference between them is that instead of uniformly distributing the six negative charges (as shown in state II), we have put the six charges at the comers of a regular octahedron. Just by the redistribution of charges the total energy of the system should not change. However, at the same time we say that in state (111). the t2g set of orbitals will be  lower in energy and the eg set will be higher. The two facts can be reconciled if the total lowering of 12 set is equal to the total raise in energy of eg orbitals which would give no resultant change in energy as compared to state (11). Of the five orbitals, three are lowered in energy and two are raised in energy. Thus each orbitals is lowered in energy by 2/5D0,    causing a total lowering of 615 & the other two orbitals are each raised in energy by 3/5D0,   causing a total raise of 6/5 D0,. The sum total of lowering and raise, being equal and opposite, turns out to be zero or no change. The D0, values are generally in the range of 100-250 kJ mol-1.


Related Discussions:- Illustrate crystal field splitting in octahedral complexes

How does the magnitude of decide the real configuration, Draw a figure to s...

Draw a figure to show splitting of degenerate d orbitals in an octahedral crystal field. How does the magnitude of decide the real configuration old orbitals in a difficult enti

Atomic Mass, why C-12 is taken as standard for atomic mass?

why C-12 is taken as standard for atomic mass?

Energy cycle or metabolism - biomolecules, Energy cycle or metabolism A...

Energy cycle or metabolism A cell has small molecules that are denoted as micromolecules also large molecules that is denoted as macromolecules. The chemical equations of a liv

What is allotropy, What is Allotropy  If the change in structure is rev...

What is Allotropy  If the change in structure is reversible then the polymorphism is called as 'allotropy'.Allotropy (Gr. allos, other, and tropos, manner) is a behavior exhibi

Summery, i wanna someone help me to do summery from 2 pages like essay for ...

i wanna someone help me to do summery from 2 pages like essay for articl?

Electrochemistry, given the mobility of hydrogen ion and cl to be 0.0000003...

given the mobility of hydrogen ion and cl to be 0.0000003623 and 0.0000000791 respectively. calculate the transference number of proton in the 0.001M solution of hydrocholric acid

Lab report, how to write a lab report

how to write a lab report

Explain the use radioactive nuclides, Q. Explain the use Radioactive Nuclid...

Q. Explain the use Radioactive Nuclides? Ans. Radioactive elements are easily found because they emit radiation. They can be used as tracers to show what is happening in

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