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CFSE for d^(6) octahedral complex having...

`CFSE` for `d^(6)` octahedral complex having `Delta =250` and `P =125kJmo1^(-1)` is .

A

`350KJMO1^(-1)`

B

`-350kJmo1^(-1)`

C

`475kJmo1^(-1)`

D

`-475kJmo1^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
b
Octahedral complex `DeltagtP` strong field pairing low spin Structrue is `t_(2g) 6 e_(g)^(4)` .
It means Pairing energy is required for 2 electrons since one pairing is already done in weak ligand
`CFSE = (-0.4 xx 6) Delta_(0) + 2P = -2.4 xx250 + 2 xx 125`
` = - 600 + 250 = - 350kJ "mole"^(-1)` .
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Crystal field splitting energey (CFSE) for the complex [Fe(O)_(4)]^(2-) is when Delta =125 and P =250kJmo1^(-1) .

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When degenerate d-orbitals of an isolated atom/ion come under influence of magnetic field of ligands, the degeneray is lost. The two set t_(2g)(d_(xy),d_(yz),d_(xz)) and e_(g) (d_(x^(2))-d_(x^(2)-y^(2)) are either stabilized or destabilized depending upon the nature of magnetic field. it can be expressed diagrammatically as: Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for tetrahedral complexes, Delta is about 4/9 times to Delta_(0) (CFSE for octahedral complex). this energy lies in visible region and i.e., why electronic transition are responsible for colour. such transition are not possible with d^(0) and d^(10) configuration. Q. For an octahedral complex, which of the followin d-electron configuration will give maximum CFSE?

When degenerate d-orbitals of an isolated atom/ion come under influence of magnetic field of ligands, the degeneray is lost. The two set t_(2g)(d_(xy),d_(yz),d_(xz)) and e_(g) (d_(x^(2))-d_(x^(2)-y^(2)) are either stabilized or destabilized depending upon the nature of magnetic field. it can be expressed diagrammatically as: Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for tetrahedral complexes, Delta is about 4/9 times to Delta_(0) (CFSE for octahedral complex). this energy lies in visible region and i.e., why electronic transition are responsible for colour. such transition are not possible with d^(0) and d^(10) configuration. Q. The extent of crystal field splitting in octahedral complexes of the given metal with particular weak field ligand are:

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