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Werner's Coordination Theory

Is B2 ( di-bo...

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Is B2 ( di-boron) a paramagnetic or diamagnetic species ? But if we consider the electronic configuration, the ninth electron would enter the pi- 2px and pi-2py , orbitals, then why we say that it is diamagnetic ?

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B_{2}

paramagnetic whereas

C_{2}

Q. Can we have magnetic hysteresis in paramagnetic or diamagnetic substances?

N O

is diamagnetic in solid or liquid state but paramagnetic in gaseous state. Reason:

N O

contains one unpaired electron.

Q. Assertion :The atoms or ions possessing unpaired electrons are paramagnetic in nature whereas those possessing electron pairs are diamagnetic in nature. Reason: In diamagnetic substances, the spins of the two electrons cancel out and thus the diamagnetic substances doesnot show any magnetic behaviour . However in paramagnetic substances, the spin of the electron counts and the resultant magnetic moment is not zero.

[N i C l_{4}]^{2 -}

is paramagnetic but when

C N^{-}

ions are added, the product

[N i (C N)_{4}]^{2 -}

is diamagnetic because in

[N i C l_{4}]^{2 -}

C l^{-}

is a weak ligand and thus, electrons are unpaired in

N i^{2 +}

making it paramagnetic,

s p^{3}

hybridised and tetrahedral.
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