0

Guest

Courses New

As per VB Theory of complex compounds, in [MnCl6]3- Mn is said to undergo sp3d2 hybridisation forming outer orbital complex. There will be a vacant 3d orbital if 4s, 4p and 4d orbitals are filled with lone electron pairs drawn from six chloride ligands. Whether VB Theory violates Aufbau principle inaddition to Hunds rule?

As per VB Theory of complex compounds, in [MnCl6]3- Mn is said to undergo sp3d2 hybridisation forming outer orbital complex. There will be a vacant 3d orbital if 4s, 4p and 4d orbitals are filled with lone electron pairs drawn from six chloride ligands.
Whether VB Theory violates Aufbau principle inaddition to Hunds rule?

Grade:

3 Answers

Rahul askIITiansExpert.IITR
110 Points
13 years ago
you must understand that the hybridisation is done when Mn comes in vicinity of chloride ions. And just before hybridisation, there is a redistribution of energy. VB theory doesn't violates Aufbau principle. The enrgy levels shift.

But even then this explanation is not satisfactpry and is further dealed in CFT.

ifficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation.

DO APPROVE IF THE ANSWER HELPS YOU.

Now you can win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Regards,

Askiitians Experts

Rahul- IIT Roorkee
SAGAR SINGH - IIT DELHI
878 Points
13 years ago
Dear Rao,

valence band theory does not violate Aufbau principle.

According to this theory a covalent bond is formed between the two atoms by the overlap of half filled valence atomic orbitals of each atom containing one unpaired electron. A valence bond structure is similar to a Lewis structure, but where a single Lewis structure cannot be written, several valence bond structures are used. Each of these VB structures represents a specific Lewis structure. This combination of valence bond structures is the main point of resonance theory. Valence bond theory considers that the overlapping atomic orbitals of the participating atoms form a chemical bond . Because of the overlapping, it is most probable that electrons should be in the bond region. Valence bond theory views bonds as weakly coupled orbitals (small overlap). Valence bond theory is typically easier to employ in ground state molecules.

Please feel free to post as many doubts on our discussion forum as you can.

We are all IITians and here to help you in your IIT JEE preparation.

All the best.

win exciting gifts by answering the questions on Discussion Forum.
Abhiram b s
21 Points
7 years ago
The hybridisation of [mncl6]3- cannot be predicted using valence bond theory. As one of the 3d-orbital becomes vacant and we will get a dsp3d which is not possible.. And also manganese cannot stay in as +3 oxidation state in coordination compound. Only +2  oxidation state can come

Think You Can Provide A Better Answer ?

Other Related Questions on Inorganic Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More