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why is K2[NiF6] diamagnetic it should be paramagnetic with sp3d2 hybridisation

why is K2[NiF6] diamagnetic
it should be paramagnetic with sp3d2 hybridisation

Grade:12

5 Answers

Arun
25750 Points
6 years ago
Their is no unpaired electron so this complex is diamagnetic in nature....... Regards.....Arun (askIITians forum expert)
suvidhi mehta
292 Points
6 years ago
4 unpaired electrons should be present since F- is a weak field ligand pairing wont take place 
is it an exceptional case to general theory
abhishek mishra
51 Points
5 years ago
It is a diamagnetic complex, Inspite of presence of weak field ligand there occurs forced pairing due to more effective nuclear charge of Ni4+ cation. This complex is d2sp3 hybridised. Ref: ( structural inorganic chemistry by Wai Kee Lee)
VIGNESH
15 Points
4 years ago
     THE OXIDATION NUMBER OF METAL IS INCREASES CORRESPONDINGLY THE ENERGY GAB BETWEEN THE t2g AND Eg ARE INCREASES. HENCE THE FREEL ELECTRON ON THE METAL(NICKEL) IS FILING FIRST IN THE t2g ORBITALS NEXT Eg ORBITAL.  HERE THE 6 ELECTRONS ON THE METAL IS FILLING IN t2g ORBITAL . SINCE THERE ARE NO UNPAIRED ELECTRON IN THIS COMPLEX. SO THIS COUMPOUND IS DIAMAGNETIC.
Rishi Sharma
askIITians Faculty 646 Points
3 years ago
Dear Student,
Please find below the solution to your problem.

THE OXIDATION NUMBER OF METAL IS INCREASES CORRESPONDINGLY THE ENERGY GAB BETWEEN THE t2g AND Eg ARE INCREASES.
HENCE THE FREEL ELECTRON ON THE METAL(NICKEL) IS FILING FIRST IN THE t2g ORBITALS NEXT Eg ORBITAL.
HERE THE 6 ELECTRONS ON THE METAL IS FILLING IN t2g ORBITAL .
SINCE THERE ARE NO UNPAIRED ELECTRON IN THIS COMPLEX.
SO THIS COUMPOUND IS DIAMAGNETIC

Thanks and Regards

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